| datetime   | flow  |
|------------|-------|
| 1978-10-01 | 55.0  |
| 1978-10-02 | 54.0  |
| 1978-10-03 | 54.0  |
| 1978-10-04 | 54.0  |
| 1978-10-05 | 54.0  |
| 1978-10-06 | 53.0  |
| 1978-10-07 | 54.0  |
| 1978-10-08 | 55.0  |
| 1978-10-09 | 56.0  |
| 1978-10-10 | 56.0  |
| 1978-10-11 | 56.0  |
| 1978-10-12 | 56.0  |
| 1978-10-13 | 56.0  |
| 1978-10-14 | 56.0  |
| 1978-10-15 | 56.0  |
| 1978-10-16 | 56.0  |
| 1978-10-17 | 56.0  |
| 1978-10-18 | 57.0  |
| 1978-10-19 | 57.0  |
| 1978-10-20 | 57.0  |
| 1978-10-21 | 57.0  |
| 1978-10-22 | 57.0  |
| 1978-10-23 | 58.0  |
| 1978-10-24 | 58.0  |
| 1978-10-25 | 58.0  |
| 1978-10-26 | 58.0  |
| 1978-10-27 | 58.0  |
| 1978-10-28 | 59.0  |
| 1978-10-29 | 59.0  |
| 1978-10-30 | 58.0  |
| 1978-10-31 | 59.0  |
| 1978-11-01 | 57.0  |
| 1978-11-02 | 55.0  |
| 1978-11-03 | 56.0  |
| 1978-11-04 | 57.0  |
| 1978-11-05 | 56.0  |
| 1978-11-06 | 55.0  |
| 1978-11-07 | 55.0  |
| 1978-11-08 | 56.0  |
| 1978-11-09 | 55.0  |
| 1978-11-10 | 54.0  |
| 1978-11-11 | 52.0  |
| 1978-11-12 | 50.0  |
| 1978-11-13 | 50.0  |
| 1978-11-14 | 50.0  |
| 1978-11-15 | 52.0  |
| 1978-11-16 | 58.0  |
| 1978-11-17 | 58.0  |
| 1978-11-18 | 58.0  |
| 1978-11-19 | 59.0  |
| 1978-11-20 | 60.0  |
| 1978-11-21 | 59.0  |
| 1978-11-22 | 59.0  |
| 1978-11-23 | 59.0  |
| 1978-11-24 | 59.0  |
| 1978-11-25 | 59.0  |
| 1978-11-26 | 58.0  |
| 1978-11-27 | 58.0  |
| 1978-11-28 | 60.0  |
| 1978-11-29 | 65.0  |
| 1978-11-30 | 65.0  |
| 1978-12-01 | 65.0  |
| 1978-12-02 | 63.0  |
| 1978-12-03 | 62.0  |
| 1978-12-04 | 64.0  |
| 1978-12-05 | 63.0  |
| 1978-12-06 | 60.0  |
| 1978-12-07 | 50.0  |
| 1978-12-08 | 50.0  |
| 1978-12-09 | 56.0  |
| 1978-12-10 | 62.0  |
| 1978-12-11 | 59.0  |
| 1978-12-12 | 58.0  |
| 1978-12-13 | 57.0  |
| 1978-12-14 | 56.0  |
| 1978-12-15 | 55.0  |
| 1978-12-16 | 55.0  |
| 1978-12-17 | 56.0  |
| 1978-12-18 | 56.0  |
| 1978-12-19 | 46.0  |
| 1978-12-20 | 46.0  |
| 1978-12-21 | 52.0  |
| 1978-12-22 | 57.0  |
| 1978-12-23 | 58.0  |
| 1978-12-24 | 59.0  |
| 1978-12-25 | 59.0  |
| 1978-12-26 | 59.0  |
| 1978-12-27 | 59.0  |
| 1978-12-28 | 52.0  |
| 1978-12-29 | 46.0  |
| 1978-12-30 | 46.0  |
| 1978-12-31 | 46.0  |
| 1979-01-01 | 46.0  |
| 1979-01-02 | 50.0  |
| 1979-01-03 | 58.0  |
| 1979-01-04 | 66.0  |
| 1979-01-05 | 56.0  |
| 1979-01-06 | 54.0  |
| 1979-01-07 | 54.0  |
| 1979-01-08 | 54.0  |
| 1979-01-09 | 58.0  |
| 1979-01-10 | 63.0  |
| 1979-01-11 | 93.0  |
| 1979-01-12 | 79.0  |
| 1979-01-13 | 70.0  |
| 1979-01-14 | 64.0  |
| 1979-01-15 | 69.0  |
| 1979-01-16 | 65.0  |
| 1979-01-17 | 63.0  |
| 1979-01-18 | 63.0  |
| 1979-01-19 | 62.0  |
| 1979-01-20 | 61.0  |
| 1979-01-21 | 60.0  |
| 1979-01-22 | 59.0  |
| 1979-01-23 | 58.0  |
| 1979-01-24 | 58.0  |
| 1979-01-25 | 57.0  |
| 1979-01-26 | 59.0  |
| 1979-01-27 | 55.0  |
| 1979-01-28 | 54.0  |
| 1979-01-29 | 48.0  |
| 1979-01-30 | 46.0  |
| 1979-01-31 | 47.0  |
| 1979-02-01 | 48.0  |
| 1979-02-02 | 49.0  |
| 1979-02-03 | 51.0  |
| 1979-02-04 | 51.0  |
| 1979-02-05 | 52.0  |
| 1979-02-06 | 53.0  |
| 1979-02-07 | 53.0  |
| 1979-02-08 | 54.0  |
| 1979-02-09 | 56.0  |
| 1979-02-10 | 58.0  |
| 1979-02-11 | 59.0  |
| 1979-02-12 | 61.0  |
| 1979-02-13 | 67.0  |
| 1979-02-14 | 67.0  |
| 1979-02-15 | 63.0  |
| 1979-02-16 | 62.0  |
| 1979-02-17 | 59.0  |
| 1979-02-18 | 59.0  |
| 1979-02-19 | 59.0  |
| 1979-02-20 | 59.0  |
| 1979-02-21 | 59.0  |
| 1979-02-22 | 59.0  |
| 1979-02-23 | 59.0  |
| 1979-02-24 | 59.0  |
| 1979-02-25 | 59.0  |
| 1979-02-26 | 60.0  |
| 1979-02-27 | 61.0  |
| 1979-02-28 | 63.0  |
| 1979-03-01 | 62.0  |
| 1979-03-02 | 61.0  |
| 1979-03-03 | 64.0  |
| 1979-03-04 | 66.0  |
| 1979-03-05 | 73.0  |
| 1979-03-06 | 74.0  |
| 1979-03-07 | 73.0  |
| 1979-03-08 | 71.0  |
| 1979-03-09 | 69.0  |
| 1979-03-10 | 69.0  |
| 1979-03-11 | 68.0  |
| 1979-03-12 | 68.0  |
| 1979-03-13 | 67.0  |
| 1979-03-14 | 67.0  |
| 1979-03-15 | 68.0  |
| 1979-03-16 | 69.0  |
| 1979-03-17 | 68.0  |
| 1979-03-18 | 68.0  |
| 1979-03-19 | 68.0  |
| 1979-03-20 | 68.0  |
| 1979-03-21 | 68.0  |
| 1979-03-22 | 68.0  |
| 1979-03-23 | 67.0  |
| 1979-03-24 | 67.0  |
| 1979-03-25 | 66.0  |
| 1979-03-26 | 66.0  |
| 1979-03-27 | 67.0  |
| 1979-03-28 | 67.0  |
| 1979-03-29 | 67.0  |
| 1979-03-30 | 66.0  |
| 1979-03-31 | 65.0  |
| 1979-04-01 | 65.0  |
| 1979-04-02 | 65.0  |
| 1979-04-03 | 65.0  |
| 1979-04-04 | 64.0  |
| 1979-04-05 | 64.0  |
| 1979-04-06 | 67.0  |
| 1979-04-07 | 66.0  |
| 1979-04-08 | 66.0  |
| 1979-04-09 | 66.0  |
| 1979-04-10 | 66.0  |
| 1979-04-11 | 67.0  |
| 1979-04-12 | 66.0  |
| 1979-04-13 | 65.0  |
| 1979-04-14 | 64.0  |
| 1979-04-15 | 65.0  |
| 1979-04-16 | 65.0  |
| 1979-04-17 | 66.0  |
| 1979-04-18 | 65.0  |
| 1979-04-19 | 65.0  |
| 1979-04-20 | 64.0  |
| 1979-04-21 | 64.0  |
| 1979-04-22 | 66.0  |
| 1979-04-23 | 67.0  |
| 1979-04-24 | 67.0  |
| 1979-04-25 | 67.0  |
| 1979-04-26 | 66.0  |
| 1979-04-27 | 64.0  |
| 1979-04-28 | 63.0  |
| 1979-04-29 | 63.0  |
| 1979-04-30 | 63.0  |
| 1979-05-01 | 65.0  |
| 1979-05-02 | 64.0  |
| 1979-05-03 | 64.0  |
| 1979-05-04 | 65.0  |
| 1979-05-05 | 68.0  |
| 1979-05-06 | 71.0  |
| 1979-05-07 | 72.0  |
| 1979-05-08 | 71.0  |
| 1979-05-09 | 68.0  |
| 1979-05-10 | 66.0  |
| 1979-05-11 | 65.0  |
| 1979-05-12 | 64.0  |
| 1979-05-13 | 64.0  |
| 1979-05-14 | 64.0  |
| 1979-05-15 | 62.0  |
| 1979-05-16 | 59.0  |
| 1979-05-17 | 58.0  |
| 1979-05-18 | 59.0  |
| 1979-05-19 | 59.0  |
| 1979-05-20 | 58.0  |
| 1979-05-21 | 58.0  |
| 1979-05-22 | 59.0  |
| 1979-05-23 | 59.0  |
| 1979-05-24 | 60.0  |
| 1979-05-25 | 59.0  |
| 1979-05-26 | 59.0  |
| 1979-05-27 | 58.0  |
| 1979-05-28 | 58.0  |
| 1979-05-29 | 57.0  |
| 1979-05-30 | 57.0  |
| 1979-05-31 | 54.0  |
| 1979-06-01 | 52.0  |
| 1979-06-02 | 51.0  |
| 1979-06-03 | 51.0  |
| 1979-06-04 | 51.0  |
| 1979-06-05 | 51.0  |
| 1979-06-06 | 51.0  |
| 1979-06-07 | 51.0  |
| 1979-06-08 | 52.0  |
| 1979-06-09 | 52.0  |
| 1979-06-10 | 51.0  |
| 1979-06-11 | 50.0  |
| 1979-06-12 | 49.0  |
| 1979-06-13 | 47.0  |
| 1979-06-14 | 45.0  |
| 1979-06-15 | 44.0  |
| 1979-06-16 | 43.0  |
| 1979-06-17 | 42.0  |
| 1979-06-18 | 47.0  |
| 1979-06-19 | 49.0  |
| 1979-06-20 | 49.0  |
| 1979-06-21 | 50.0  |
| 1979-06-22 | 50.0  |
| 1979-06-23 | 49.0  |
| 1979-06-24 | 50.0  |
| 1979-06-25 | 50.0  |
| 1979-06-26 | 49.0  |
| 1979-06-27 | 48.0  |
| 1979-06-28 | 48.0  |
| 1979-06-29 | 46.0  |
| 1979-06-30 | 46.0  |
| 1979-07-01 | 47.0  |
| 1979-07-02 | 47.0  |
| 1979-07-03 | 47.0  |
| 1979-07-04 | 47.0  |
| 1979-07-05 | 47.0  |
| 1979-07-06 | 47.0  |
| 1979-07-07 | 46.0  |
| 1979-07-08 | 46.0  |
| 1979-07-09 | 46.0  |
| 1979-07-10 | 46.0  |
| 1979-07-11 | 45.0  |
| 1979-07-12 | 44.0  |
| 1979-07-13 | 44.0  |
| 1979-07-14 | 44.0  |
| 1979-07-15 | 44.0  |
| 1979-07-16 | 46.0  |
| 1979-07-17 | 44.0  |
| 1979-07-18 | 46.0  |
| 1979-07-19 | 46.0  |
| 1979-07-20 | 46.0  |
| 1979-07-21 | 44.0  |
| 1979-07-22 | 43.0  |
| 1979-07-23 | 43.0  |
| 1979-07-24 | 43.0  |
| 1979-07-25 | 43.0  |
| 1979-07-26 | 42.0  |
| 1979-07-27 | 41.0  |
| 1979-07-28 | 40.0  |
| 1979-07-29 | 40.0  |
| 1979-07-30 | 40.0  |
| 1979-07-31 | 40.0  |
| 1979-08-01 | 40.0  |
| 1979-08-02 | 43.0  |
| 1979-08-03 | 44.0  |
| 1979-08-04 | 43.0  |
| 1979-08-05 | 38.0  |
| 1979-08-06 | 40.0  |
| 1979-08-07 | 44.0  |
| 1979-08-08 | 45.0  |
| 1979-08-09 | 45.0  |
| 1979-08-10 | 45.0  |
| 1979-08-11 | 45.0  |
| 1979-08-12 | 45.0  |
| 1979-08-13 | 46.0  |
| 1979-08-14 | 47.0  |
| 1979-08-15 | 46.0  |
| 1979-08-16 | 46.0  |
| 1979-08-17 | 46.0  |
| 1979-08-18 | 45.0  |
| 1979-08-19 | 45.0  |
| 1979-08-20 | 48.0  |
| 1979-08-21 | 53.0  |
| 1979-08-22 | 58.0  |
| 1979-08-23 | 52.0  |
| 1979-08-24 | 47.0  |
| 1979-08-25 | 45.0  |
| 1979-08-26 | 45.0  |
| 1979-08-27 | 45.0  |
| 1979-08-28 | 46.0  |
| 1979-08-29 | 47.0  |
| 1979-08-30 | 49.0  |
| 1979-08-31 | 47.0  |
| 1979-09-01 | 47.0  |
| 1979-09-02 | 47.0  |
| 1979-09-03 | 46.0  |
| 1979-09-04 | 43.0  |
| 1979-09-05 | 46.0  |
| 1979-09-06 | 50.0  |
| 1979-09-07 | 50.0  |
| 1979-09-08 | 50.0  |
| 1979-09-09 | 49.0  |
| 1979-09-10 | 49.0  |
| 1979-09-11 | 49.0  |
| 1979-09-12 | 50.0  |
| 1979-09-13 | 48.0  |
| 1979-09-14 | 45.0  |
| 1979-09-15 | 45.0  |
| 1979-09-16 | 46.0  |
| 1979-09-17 | 46.0  |
| 1979-09-18 | 46.0  |
| 1979-09-19 | 46.0  |
| 1979-09-20 | 46.0  |
| 1979-09-21 | 46.0  |
| 1979-09-22 | 46.0  |
| 1979-09-23 | 46.0  |
| 1979-09-24 | 47.0  |
| 1979-09-25 | 47.0  |
| 1979-09-26 | 49.0  |
| 1979-09-27 | 50.0  |
| 1979-09-28 | 51.0  |
| 1979-09-29 | 51.0  |
| 1979-09-30 | 51.0  |
| 1979-10-01 | 51.0  |
| 1979-10-02 | 48.0  |
| 1979-10-03 | 47.0  |
| 1979-10-04 | 47.0  |
| 1979-10-05 | 47.0  |
| 1979-10-06 | 47.0  |
| 1979-10-07 | 45.0  |
| 1979-10-08 | 43.0  |
| 1979-10-09 | 43.0  |
| 1979-10-10 | 44.0  |
| 1979-10-11 | 46.0  |
| 1979-10-12 | 46.0  |
| 1979-10-13 | 46.0  |
| 1979-10-14 | 47.0  |
| 1979-10-15 | 56.0  |
| 1979-10-16 | 61.0  |
| 1979-10-17 | 57.0  |
| 1979-10-18 | 60.0  |
| 1979-10-19 | 63.0  |
| 1979-10-20 | 62.0  |
| 1979-10-21 | 60.0  |
| 1979-10-22 | 59.0  |
| 1979-10-23 | 59.0  |
| 1979-10-24 | 59.0  |
| 1979-10-25 | 60.0  |
| 1979-10-26 | 60.0  |
| 1979-10-27 | 59.0  |
| 1979-10-28 | 60.0  |
| 1979-10-29 | 59.0  |
| 1979-10-30 | 67.0  |
| 1979-10-31 | 69.0  |
| 1979-11-01 | 62.0  |
| 1979-11-02 | 59.0  |
| 1979-11-03 | 60.0  |
| 1979-11-04 | 62.0  |
| 1979-11-05 | 62.0  |
| 1979-11-06 | 61.0  |
| 1979-11-07 | 59.0  |
| 1979-11-08 | 59.0  |
| 1979-11-09 | 59.0  |
| 1979-11-10 | 59.0  |
| 1979-11-11 | 59.0  |
| 1979-11-12 | 59.0  |
| 1979-11-13 | 58.0  |
| 1979-11-14 | 58.0  |
| 1979-11-15 | 58.0  |
| 1979-11-16 | 61.0  |
| 1979-11-17 | 68.0  |
| 1979-11-18 | 68.0  |
| 1979-11-19 | 66.0  |
| 1979-11-20 | 63.0  |
| 1979-11-21 | 60.0  |
| 1979-11-22 | 60.0  |
| 1979-11-23 | 60.0  |
| 1979-11-24 | 62.0  |
| 1979-11-25 | 63.0  |
| 1979-11-26 | 63.0  |
| 1979-11-27 | 60.0  |
| 1979-11-28 | 58.0  |
| 1979-11-29 | 58.0  |
| 1979-11-30 | 58.0  |
| 1979-12-01 | 58.0  |
| 1979-12-02 | 61.0  |
| 1979-12-03 | 69.0  |
| 1979-12-04 | 69.0  |
| 1979-12-05 | 68.0  |
| 1979-12-06 | 67.0  |
| 1979-12-07 | 66.0  |
| 1979-12-08 | 64.0  |
| 1979-12-09 | 63.0  |
| 1979-12-10 | 62.0  |
| 1979-12-11 | 59.0  |
| 1979-12-12 | 58.0  |
| 1979-12-13 | 59.0  |
| 1979-12-14 | 59.0  |
| 1979-12-15 | 59.0  |
| 1979-12-16 | 58.0  |
| 1979-12-17 | 58.0  |
| 1979-12-18 | 59.0  |
| 1979-12-19 | 59.0  |
| 1979-12-20 | 59.0  |
| 1979-12-21 | 59.0  |
| 1979-12-22 | 58.0  |
| 1979-12-23 | 57.0  |
| 1979-12-24 | 57.0  |
| 1979-12-25 | 58.0  |
| 1979-12-26 | 58.0  |
| 1979-12-27 | 57.0  |
| 1979-12-28 | 57.0  |
| 1979-12-29 | 57.0  |
| 1979-12-30 | 58.0  |
| 1979-12-31 | 60.0  |
| 1980-01-01 | 61.0  |
| 1980-01-02 | 62.0  |
| 1980-01-03 | 61.0  |
| 1980-01-04 | 61.0  |
| 1980-01-05 | 62.0  |
| 1980-01-06 | 61.0  |
| 1980-01-07 | 60.0  |
| 1980-01-08 | 60.0  |
| 1980-01-09 | 60.0  |
| 1980-01-10 | 59.0  |
| 1980-01-11 | 58.0  |
| 1980-01-12 | 81.7  |
| 1980-01-13 | 91.6  |
| 1980-01-14 | 83.5  |
| 1980-01-15 | 79.0  |
| 1980-01-16 | 79.0  |
| 1980-01-17 | 79.0  |
| 1980-01-18 | 76.0  |
| 1980-01-19 | 74.0  |
| 1980-01-20 | 68.0  |
| 1980-01-21 | 67.0  |
| 1980-01-22 | 66.0  |
| 1980-01-23 | 65.0  |
| 1980-01-24 | 64.0  |
| 1980-01-25 | 63.0  |
| 1980-01-26 | 61.0  |
| 1980-01-27 | 60.0  |
| 1980-01-28 | 56.0  |
| 1980-01-29 | 54.0  |
| 1980-01-30 | 54.0  |
| 1980-01-31 | 54.0  |
| 1980-02-01 | 56.0  |
| 1980-02-02 | 60.0  |
| 1980-02-03 | 64.0  |
| 1980-02-04 | 64.0  |
| 1980-02-05 | 63.0  |
| 1980-02-06 | 63.0  |
| 1980-02-07 | 62.0  |
| 1980-02-08 | 62.0  |
| 1980-02-09 | 61.0  |
| 1980-02-10 | 61.0  |
| 1980-02-11 | 61.0  |
| 1980-02-12 | 61.0  |
| 1980-02-13 | 60.0  |
| 1980-02-14 | 60.0  |
| 1980-02-15 | 61.0  |
| 1980-02-16 | 61.0  |
| 1980-02-17 | 62.0  |
| 1980-02-18 | 65.0  |
| 1980-02-19 | 65.0  |
| 1980-02-20 | 66.0  |
| 1980-02-21 | 66.0  |
| 1980-02-22 | 65.0  |
| 1980-02-23 | 65.0  |
| 1980-02-24 | 64.0  |
| 1980-02-25 | 64.0  |
| 1980-02-26 | 64.0  |
| 1980-02-27 | 64.0  |
| 1980-02-28 | 64.0  |
| 1980-02-29 | 64.0  |
| 1980-03-01 | 63.0  |
| 1980-03-02 | 65.0  |
| 1980-03-03 | 66.0  |
| 1980-03-04 | 67.0  |
| 1980-03-05 | 67.0  |
| 1980-03-06 | 67.0  |
| 1980-03-07 | 66.0  |
| 1980-03-08 | 65.0  |
| 1980-03-09 | 64.0  |
| 1980-03-10 | 64.0  |
| 1980-03-11 | 64.0  |
| 1980-03-12 | 63.0  |
| 1980-03-13 | 65.0  |
| 1980-03-14 | 66.0  |
| 1980-03-15 | 67.0  |
| 1980-03-16 | 66.0  |
| 1980-03-17 | 67.0  |
| 1980-03-18 | 67.0  |
| 1980-03-19 | 66.0  |
| 1980-03-20 | 66.0  |
| 1980-03-21 | 65.0  |
| 1980-03-22 | 65.0  |
| 1980-03-23 | 64.0  |
| 1980-03-24 | 64.0  |
| 1980-03-25 | 64.0  |
| 1980-03-26 | 64.0  |
| 1980-03-27 | 63.0  |
| 1980-03-28 | 62.0  |
| 1980-03-29 | 62.0  |
| 1980-03-30 | 62.0  |
| 1980-03-31 | 60.0  |
| 1980-04-01 | 61.0  |
| 1980-04-02 | 61.0  |
| 1980-04-03 | 63.0  |
| 1980-04-04 | 63.0  |
| 1980-04-05 | 64.0  |
| 1980-04-06 | 65.0  |
| 1980-04-07 | 64.0  |
| 1980-04-08 | 65.0  |
| 1980-04-09 | 65.0  |
| 1980-04-10 | 66.0  |
| 1980-04-11 | 66.0  |
| 1980-04-12 | 66.0  |
| 1980-04-13 | 65.0  |
| 1980-04-14 | 65.0  |
| 1980-04-15 | 65.0  |
| 1980-04-16 | 65.0  |
| 1980-04-17 | 66.0  |
| 1980-04-18 | 68.0  |
| 1980-04-19 | 70.0  |
| 1980-04-20 | 74.0  |
| 1980-04-21 | 76.0  |
| 1980-04-22 | 73.0  |
| 1980-04-23 | 74.0  |
| 1980-04-24 | 74.0  |
| 1980-04-25 | 74.0  |
| 1980-04-26 | 74.0  |
| 1980-04-27 | 72.0  |
| 1980-04-28 | 74.0  |
| 1980-04-29 | 74.0  |
| 1980-04-30 | 73.0  |
| 1980-05-01 | 73.0  |
| 1980-05-02 | 72.0  |
| 1980-05-03 | 69.0  |
| 1980-05-04 | 68.0  |
| 1980-05-05 | 68.0  |
| 1980-05-06 | 69.0  |
| 1980-05-07 | 69.0  |
| 1980-05-08 | 68.0  |
| 1980-05-09 | 69.0  |
| 1980-05-10 | 72.0  |
| 1980-05-11 | 71.0  |
| 1980-05-12 | 68.0  |
| 1980-05-13 | 71.0  |
| 1980-05-14 | 70.0  |
| 1980-05-15 | 68.0  |
| 1980-05-16 | 65.0  |
| 1980-05-17 | 63.0  |
| 1980-05-18 | 65.0  |
| 1980-05-19 | 66.0  |
| 1980-05-20 | 66.0  |
| 1980-05-21 | 66.0  |
| 1980-05-22 | 67.0  |
| 1980-05-23 | 67.0  |
| 1980-05-24 | 66.0  |
| 1980-05-25 | 65.0  |
| 1980-05-26 | 64.0  |
| 1980-05-27 | 63.0  |
| 1980-05-28 | 62.0  |
| 1980-05-29 | 60.0  |
| 1980-05-30 | 58.0  |
| 1980-05-31 | 58.0  |
| 1980-06-01 | 58.0  |
| 1980-06-02 | 58.0  |
| 1980-06-03 | 60.0  |
| 1980-06-04 | 59.0  |
| 1980-06-05 | 59.0  |
| 1980-06-06 | 60.0  |
| 1980-06-07 | 66.0  |
| 1980-06-08 | 78.0  |
| 1980-06-09 | 72.0  |
| 1980-06-10 | 68.0  |
| 1980-06-11 | 66.0  |
| 1980-06-12 | 67.0  |
| 1980-06-13 | 66.0  |
| 1980-06-14 | 66.0  |
| 1980-06-15 | 65.0  |
| 1980-06-16 | 64.0  |
| 1980-06-17 | 62.0  |
| 1980-06-18 | 61.0  |
| 1980-06-19 | 60.0  |
| 1980-06-20 | 57.0  |
| 1980-06-21 | 53.0  |
| 1980-06-22 | 52.0  |
| 1980-06-23 | 55.0  |
| 1980-06-24 | 54.0  |
| 1980-06-25 | 54.0  |
| 1980-06-26 | 54.0  |
| 1980-06-27 | 54.0  |
| 1980-06-28 | 54.0  |
| 1980-06-29 | 52.0  |
| 1980-06-30 | 52.0  |
| 1980-07-01 | 52.0  |
| 1980-07-02 | 52.0  |
| 1980-07-03 | 53.0  |
| 1980-07-04 | 54.0  |
| 1980-07-05 | 53.0  |
| 1980-07-06 | 51.0  |
| 1980-07-07 | 52.0  |
| 1980-07-08 | 51.0  |
| 1980-07-09 | 50.0  |
| 1980-07-10 | 51.0  |
| 1980-07-11 | 51.0  |
| 1980-07-12 | 50.0  |
| 1980-07-13 | 50.0  |
| 1980-07-14 | 51.0  |
| 1980-07-15 | 50.0  |
| 1980-07-16 | 49.0  |
| 1980-07-17 | 50.0  |
| 1980-07-18 | 49.0  |
| 1980-07-19 | 49.0  |
| 1980-07-20 | 49.0  |
| 1980-07-21 | 49.0  |
| 1980-07-22 | 48.0  |
| 1980-07-23 | 48.0  |
| 1980-07-24 | 48.0  |
| 1980-07-25 | 47.0  |
| 1980-07-26 | 47.0  |
| 1980-07-27 | 46.0  |
| 1980-07-28 | 45.0  |
| 1980-07-29 | 44.0  |
| 1980-07-30 | 43.0  |
| 1980-07-31 | 41.0  |
| 1980-08-01 | 42.0  |
| 1980-08-02 | 44.0  |
| 1980-08-03 | 42.0  |
| 1980-08-04 | 42.0  |
| 1980-08-05 | 42.0  |
| 1980-08-06 | 42.0  |
| 1980-08-07 | 44.0  |
| 1980-08-08 | 45.0  |
| 1980-08-09 | 45.0  |
| 1980-08-10 | 45.0  |
| 1980-08-11 | 45.0  |
| 1980-08-12 | 45.0  |
| 1980-08-13 | 45.0  |
| 1980-08-14 | 45.0  |
| 1980-08-15 | 44.0  |
| 1980-08-16 | 44.0  |
| 1980-08-17 | 42.0  |
| 1980-08-18 | 42.0  |
| 1980-08-19 | 45.0  |
| 1980-08-20 | 45.0  |
| 1980-08-21 | 44.0  |
| 1980-08-22 | 45.0  |
| 1980-08-23 | 42.0  |
| 1980-08-24 | 42.0  |
| 1980-08-25 | 42.0  |
| 1980-08-26 | 42.0  |
| 1980-08-27 | 42.0  |
| 1980-08-28 | 42.0  |
| 1980-08-29 | 42.0  |
| 1980-08-30 | 42.0  |
| 1980-08-31 | 42.0  |
| 1980-09-01 | 42.0  |
| 1980-09-02 | 42.0  |
| 1980-09-03 | 42.0  |
| 1980-09-04 | 42.0  |
| 1980-09-05 | 42.0  |
| 1980-09-06 | 42.0  |
| 1980-09-07 | 43.0  |
| 1980-09-08 | 42.0  |
| 1980-09-09 | 42.0  |
| 1980-09-10 | 43.0  |
| 1980-09-11 | 45.0  |
| 1980-09-12 | 44.0  |
| 1980-09-13 | 46.0  |
| 1980-09-14 | 46.0  |
| 1980-09-15 | 44.0  |
| 1980-09-16 | 44.0  |
| 1980-09-17 | 44.0  |
| 1980-09-18 | 46.0  |
| 1980-09-19 | 45.0  |
| 1980-09-20 | 45.0  |
| 1980-09-21 | 44.0  |
| 1980-09-22 | 45.0  |
| 1980-09-23 | 45.0  |
| 1980-09-24 | 45.0  |
| 1980-09-25 | 45.0  |
| 1980-09-26 | 46.0  |
| 1980-09-27 | 49.0  |
| 1980-09-28 | 51.0  |
| 1980-09-29 | 51.0  |
| 1980-09-30 | 51.0  |
| 1980-10-01 | 51.0  |
| 1980-10-02 | 51.0  |
| 1980-10-03 | 50.0  |
| 1980-10-04 | 49.0  |
| 1980-10-05 | 49.0  |
| 1980-10-06 | 50.0  |
| 1980-10-07 | 48.0  |
| 1980-10-08 | 48.0  |
| 1980-10-09 | 49.0  |
| 1980-10-10 | 49.0  |
| 1980-10-11 | 50.0  |
| 1980-10-12 | 50.0  |
| 1980-10-13 | 50.0  |
| 1980-10-14 | 49.0  |
| 1980-10-15 | 49.0  |
| 1980-10-16 | 48.0  |
| 1980-10-17 | 48.0  |
| 1980-10-18 | 48.0  |
| 1980-10-19 | 49.0  |
| 1980-10-20 | 50.0  |
| 1980-10-21 | 50.0  |
| 1980-10-22 | 51.0  |
| 1980-10-23 | 52.0  |
| 1980-10-24 | 53.0  |
| 1980-10-25 | 53.0  |
| 1980-10-26 | 54.0  |
| 1980-10-27 | 53.0  |
| 1980-10-28 | 53.0  |
| 1980-10-29 | 53.0  |
| 1980-10-30 | 53.0  |
| 1980-10-31 | 53.0  |
| 1980-11-01 | 52.0  |
| 1980-11-02 | 52.0  |
| 1980-11-03 | 52.0  |
| 1980-11-04 | 51.0  |
| 1980-11-05 | 52.0  |
| 1980-11-06 | 58.0  |
| 1980-11-07 | 57.0  |
| 1980-11-08 | 54.0  |
| 1980-11-09 | 53.0  |
| 1980-11-10 | 53.0  |
| 1980-11-11 | 52.0  |
| 1980-11-12 | 52.0  |
| 1980-11-13 | 52.0  |
| 1980-11-14 | 52.0  |
| 1980-11-15 | 52.0  |
| 1980-11-16 | 53.0  |
| 1980-11-17 | 52.0  |
| 1980-11-18 | 53.0  |
| 1980-11-19 | 53.0  |
| 1980-11-20 | 53.0  |
| 1980-11-21 | 55.0  |
| 1980-11-22 | 60.0  |
| 1980-11-23 | 60.0  |
| 1980-11-24 | 60.0  |
| 1980-11-25 | 58.0  |
| 1980-11-26 | 57.0  |
| 1980-11-27 | 57.0  |
| 1980-11-28 | 57.0  |
| 1980-11-29 | 57.0  |
| 1980-11-30 | 57.0  |
| 1980-12-01 | 57.0  |
| 1980-12-02 | 63.0  |
| 1980-12-03 | 72.0  |
| 1980-12-04 | 69.0  |
| 1980-12-05 | 63.0  |
| 1980-12-06 | 57.0  |
| 1980-12-07 | 52.0  |
| 1980-12-08 | 52.0  |
| 1980-12-09 | 52.0  |
| 1980-12-10 | 52.0  |
| 1980-12-11 | 52.0  |
| 1980-12-12 | 52.0  |
| 1980-12-13 | 52.0  |
| 1980-12-14 | 54.0  |
| 1980-12-15 | 56.0  |
| 1980-12-16 | 59.0  |
| 1980-12-17 | 59.0  |
| 1980-12-18 | 59.0  |
| 1980-12-19 | 59.0  |
| 1980-12-20 | 60.0  |
| 1980-12-21 | 62.0  |
| 1980-12-22 | 64.0  |
| 1980-12-23 | 62.0  |
| 1980-12-24 | 63.0  |
| 1980-12-25 | 67.0  |
| 1980-12-26 | 66.0  |
| 1980-12-27 | 65.0  |
| 1980-12-28 | 64.0  |
| 1980-12-29 | 64.0  |
| 1980-12-30 | 64.0  |
| 1980-12-31 | 63.0  |
| 1981-01-01 | 63.0  |
| 1981-01-02 | 62.0  |
| 1981-01-03 | 61.0  |
| 1981-01-04 | 61.0  |
| 1981-01-05 | 61.0  |
| 1981-01-06 | 60.0  |
| 1981-01-07 | 60.0  |
| 1981-01-08 | 60.0  |
| 1981-01-09 | 60.0  |
| 1981-01-10 | 59.0  |
| 1981-01-11 | 59.0  |
| 1981-01-12 | 59.0  |
| 1981-01-13 | 58.0  |
| 1981-01-14 | 57.0  |
| 1981-01-15 | 58.0  |
| 1981-01-16 | 58.0  |
| 1981-01-17 | 59.0  |
| 1981-01-18 | 59.0  |
| 1981-01-19 | 58.0  |
| 1981-01-20 | 59.0  |
| 1981-01-21 | 60.0  |
| 1981-01-22 | 62.0  |
| 1981-01-23 | 64.0  |
| 1981-01-24 | 62.0  |
| 1981-01-25 | 60.0  |
| 1981-01-26 | 58.0  |
| 1981-01-27 | 60.0  |
| 1981-01-28 | 66.0  |
| 1981-01-29 | 68.0  |
| 1981-01-30 | 68.0  |
| 1981-01-31 | 60.0  |
| 1981-02-01 | 58.0  |
| 1981-02-02 | 58.0  |
| 1981-02-03 | 58.0  |
| 1981-02-04 | 58.0  |
| 1981-02-05 | 58.0  |
| 1981-02-06 | 58.0  |
| 1981-02-07 | 58.0  |
| 1981-02-08 | 58.0  |
| 1981-02-09 | 58.0  |
| 1981-02-10 | 60.0  |
| 1981-02-11 | 63.0  |
| 1981-02-12 | 67.0  |
| 1981-02-13 | 75.0  |
| 1981-02-14 | 100.0 |
| 1981-02-15 | 130.0 |
| 1981-02-16 | 100.0 |
| 1981-02-17 | 110.0 |
| 1981-02-18 | 100.0 |
| 1981-02-19 | 90.0  |
| 1981-02-20 | 100.0 |
| 1981-02-21 | 75.0  |
| 1981-02-22 | 66.0  |
| 1981-02-23 | 62.0  |
| 1981-02-24 | 60.0  |
| 1981-02-25 | 59.0  |
| 1981-02-26 | 59.0  |
| 1981-02-27 | 58.0  |
| 1981-02-28 | 59.0  |
| 1981-03-01 | 59.0  |
| 1981-03-02 | 58.0  |
| 1981-03-03 | 58.0  |
| 1981-03-04 | 58.0  |
| 1981-03-05 | 57.0  |
| 1981-03-06 | 57.0  |
| 1981-03-07 | 58.0  |
| 1981-03-08 | 57.0  |
| 1981-03-09 | 57.0  |
| 1981-03-10 | 57.0  |
| 1981-03-11 | 57.0  |
| 1981-03-12 | 57.0  |
| 1981-03-13 | 57.0  |
| 1981-03-14 | 57.0  |
| 1981-03-15 | 56.0  |
| 1981-03-16 | 56.0  |
| 1981-03-17 | 55.0  |
| 1981-03-18 | 55.0  |
| 1981-03-19 | 57.0  |
| 1981-03-20 | 57.0  |
| 1981-03-21 | 56.0  |
| 1981-03-22 | 56.0  |
| 1981-03-23 | 56.0  |
| 1981-03-24 | 56.0  |
| 1981-03-25 | 58.0  |
| 1981-03-26 | 58.0  |
| 1981-03-27 | 57.0  |
| 1981-03-28 | 56.0  |
| 1981-03-29 | 56.0  |
| 1981-03-30 | 56.0  |
| 1981-03-31 | 56.0  |
| 1981-04-01 | 57.0  |
| 1981-04-02 | 56.0  |
| 1981-04-03 | 57.0  |
| 1981-04-04 | 56.0  |
| 1981-04-05 | 56.0  |
| 1981-04-06 | 55.0  |
| 1981-04-07 | 55.0  |
| 1981-04-08 | 56.0  |
| 1981-04-09 | 55.0  |
| 1981-04-10 | 54.0  |
| 1981-04-11 | 55.0  |
| 1981-04-12 | 54.0  |
| 1981-04-13 | 54.0  |
| 1981-04-14 | 53.0  |
| 1981-04-15 | 50.0  |
| 1981-04-16 | 49.0  |
| 1981-04-17 | 48.0  |
| 1981-04-18 | 48.0  |
| 1981-04-19 | 48.0  |
| 1981-04-20 | 48.0  |
| 1981-04-21 | 47.0  |
| 1981-04-22 | 47.0  |
| 1981-04-23 | 47.0  |
| 1981-04-24 | 47.0  |
| 1981-04-25 | 47.0  |
| 1981-04-26 | 47.0  |
| 1981-04-27 | 47.0  |
| 1981-04-28 | 47.0  |
| 1981-04-29 | 47.0  |
| 1981-04-30 | 47.0  |
| 1981-05-01 | 47.0  |
| 1981-05-02 | 47.0  |
| 1981-05-03 | 47.0  |
| 1981-05-04 | 47.0  |
| 1981-05-05 | 47.0  |
| 1981-05-06 | 47.0  |
| 1981-05-07 | 47.0  |
| 1981-05-08 | 47.0  |
| 1981-05-09 | 47.0  |
| 1981-05-10 | 47.0  |
| 1981-05-11 | 47.0  |
| 1981-05-12 | 47.0  |
| 1981-05-13 | 47.0  |
| 1981-05-14 | 47.0  |
| 1981-05-15 | 47.0  |
| 1981-05-16 | 49.0  |
| 1981-05-17 | 49.0  |
| 1981-05-18 | 49.0  |
| 1981-05-19 | 49.0  |
| 1981-05-20 | 49.0  |
| 1981-05-21 | 49.0  |
| 1981-05-22 | 49.0  |
| 1981-05-23 | 49.0  |
| 1981-05-24 | 49.0  |
| 1981-05-25 | 49.0  |
| 1981-05-26 | 49.0  |
| 1981-05-27 | 49.0  |
| 1981-05-28 | 49.0  |
| 1981-05-29 | 49.0  |
| 1981-05-30 | 49.0  |
| 1981-05-31 | 49.0  |
| 1981-06-01 | 49.0  |
| 1981-06-02 | 49.0  |
| 1981-06-03 | 49.0  |
| 1981-06-04 | 49.0  |
| 1981-06-05 | 49.0  |
| 1981-06-06 | 49.0  |
| 1981-06-07 | 49.0  |
| 1981-06-08 | 53.0  |
| 1981-06-09 | 53.0  |
| 1981-06-10 | 50.0  |
| 1981-06-11 | 49.0  |
| 1981-06-12 | 50.0  |
| 1981-06-13 | 50.0  |
| 1981-06-14 | 50.0  |
| 1981-06-15 | 49.0  |
| 1981-06-16 | 48.0  |
| 1981-06-17 | 47.0  |
| 1981-06-18 | 51.0  |
| 1981-06-19 | 51.0  |
| 1981-06-20 | 48.0  |
| 1981-06-21 | 47.0  |
| 1981-06-22 | 46.0  |
| 1981-06-23 | 45.0  |
| 1981-06-24 | 44.0  |
| 1981-06-25 | 46.0  |
| 1981-06-26 | 46.0  |
| 1981-06-27 | 42.0  |
| 1981-06-28 | 45.0  |
| 1981-06-29 | 45.0  |
| 1981-06-30 | 44.0  |
| 1981-07-01 | 43.0  |
| 1981-07-02 | 42.0  |
| 1981-07-03 | 43.0  |
| 1981-07-04 | 42.0  |
| 1981-07-05 | 43.0  |
| 1981-07-06 | 43.0  |
| 1981-07-07 | 42.0  |
| 1981-07-08 | 42.0  |
| 1981-07-09 | 41.0  |
| 1981-07-10 | 41.0  |
| 1981-07-11 | 40.0  |
| 1981-07-12 | 40.0  |
| 1981-07-13 | 41.0  |
| 1981-07-14 | 41.0  |
| 1981-07-15 | 40.0  |
| 1981-07-16 | 37.0  |
| 1981-07-17 | 37.0  |
| 1981-07-18 | 34.0  |
| 1981-07-19 | 37.0  |
| 1981-07-20 | 38.0  |
| 1981-07-21 | 40.0  |
| 1981-07-22 | 39.0  |
| 1981-07-23 | 39.0  |
| 1981-07-24 | 38.0  |
| 1981-07-25 | 36.0  |
| 1981-07-26 | 36.0  |
| 1981-07-27 | 36.0  |
| 1981-07-28 | 37.0  |
| 1981-07-29 | 38.0  |
| 1981-07-30 | 39.0  |
| 1981-07-31 | 39.0  |
| 1981-08-01 | 39.0  |
| 1981-08-02 | 39.0  |
| 1981-08-03 | 39.0  |
| 1981-08-04 | 39.0  |
| 1981-08-05 | 37.0  |
| 1981-08-06 | 37.0  |
| 1981-08-07 | 36.0  |
| 1981-08-08 | 38.0  |
| 1981-08-09 | 38.0  |
| 1981-08-10 | 38.0  |
| 1981-08-11 | 37.0  |
| 1981-08-12 | 34.0  |
| 1981-08-13 | 39.0  |
| 1981-08-14 | 37.0  |
| 1981-08-15 | 37.0  |
| 1981-08-16 | 39.0  |
| 1981-08-17 | 39.0  |
| 1981-08-18 | 39.0  |
| 1981-08-19 | 38.0  |
| 1981-08-20 | 36.0  |
| 1981-08-21 | 38.0  |
| 1981-08-22 | 39.0  |
| 1981-08-23 | 39.0  |
| 1981-08-24 | 39.0  |
| 1981-08-25 | 39.0  |
| 1981-08-26 | 39.0  |
| 1981-08-27 | 39.0  |
| 1981-08-28 | 40.0  |
| 1981-08-29 | 40.0  |
| 1981-08-30 | 40.0  |
| 1981-08-31 | 40.0  |
| 1981-09-01 | 39.0  |
| 1981-09-02 | 37.0  |
| 1981-09-03 | 37.0  |
| 1981-09-04 | 37.0  |
| 1981-09-05 | 40.0  |
| 1981-09-06 | 40.0  |
| 1981-09-07 | 40.0  |
| 1981-09-08 | 40.0  |
| 1981-09-09 | 40.0  |
| 1981-09-10 | 39.0  |
| 1981-09-11 | 40.0  |
| 1981-09-12 | 40.0  |
| 1981-09-13 | 41.0  |
| 1981-09-14 | 41.0  |
| 1981-09-15 | 41.0  |
| 1981-09-16 | 41.0  |
| 1981-09-17 | 41.0  |
| 1981-09-18 | 41.0  |
| 1981-09-19 | 41.0  |
| 1981-09-20 | 41.0  |
| 1981-09-21 | 41.0  |
| 1981-09-22 | 41.0  |
| 1981-09-23 | 41.0  |
| 1981-09-24 | 41.0  |
| 1981-09-25 | 41.0  |
| 1981-09-26 | 41.0  |
| 1981-09-27 | 44.0  |
| 1981-09-28 | 44.0  |
| 1981-09-29 | 42.0  |
| 1981-09-30 | 42.0  |
| 1981-10-01 | 42.0  |
| 1981-10-02 | 42.0  |
| 1981-10-03 | 42.0  |
| 1981-10-04 | 42.0  |
| 1981-10-05 | 42.0  |
| 1981-10-06 | 42.0  |
| 1981-10-07 | 45.0  |
| 1981-10-08 | 43.0  |
| 1981-10-09 | 44.0  |
| 1981-10-10 | 46.0  |
| 1981-10-11 | 49.0  |
| 1981-10-12 | 57.0  |
| 1981-10-13 | 58.0  |
| 1981-10-14 | 58.0  |
| 1981-10-15 | 57.0  |
| 1981-10-16 | 56.0  |
| 1981-10-17 | 54.0  |
| 1981-10-18 | 51.0  |
| 1981-10-19 | 45.0  |
| 1981-10-20 | 44.0  |
| 1981-10-21 | 44.0  |
| 1981-10-22 | 44.0  |
| 1981-10-23 | 47.0  |
| 1981-10-24 | 51.0  |
| 1981-10-25 | 51.0  |
| 1981-10-26 | 53.0  |
| 1981-10-27 | 54.0  |
| 1981-10-28 | 54.0  |
| 1981-10-29 | 54.0  |
| 1981-10-30 | 53.0  |
| 1981-10-31 | 53.0  |
| 1981-11-01 | 52.0  |
| 1981-11-02 | 52.0  |
| 1981-11-03 | 52.0  |
| 1981-11-04 | 52.0  |
| 1981-11-05 | 51.0  |
| 1981-11-06 | 51.0  |
| 1981-11-07 | 51.0  |
| 1981-11-08 | 51.0  |
| 1981-11-09 | 51.0  |
| 1981-11-10 | 51.0  |
| 1981-11-11 | 51.0  |
| 1981-11-12 | 54.0  |
| 1981-11-13 | 54.0  |
| 1981-11-14 | 55.0  |
| 1981-11-15 | 59.0  |
| 1981-11-16 | 69.0  |
| 1981-11-17 | 66.0  |
| 1981-11-18 | 60.0  |
| 1981-11-19 | 60.0  |
| 1981-11-20 | 61.0  |
| 1981-11-21 | 63.0  |
| 1981-11-22 | 66.0  |
| 1981-11-23 | 68.0  |
| 1981-11-24 | 71.0  |
| 1981-11-25 | 70.0  |
| 1981-11-26 | 66.0  |
| 1981-11-27 | 63.0  |
| 1981-11-28 | 61.0  |
| 1981-11-29 | 60.0  |
| 1981-11-30 | 60.0  |
| 1981-12-01 | 62.0  |
| 1981-12-02 | 63.0  |
| 1981-12-03 | 64.0  |
| 1981-12-04 | 62.0  |
| 1981-12-05 | 62.0  |
| 1981-12-06 | 67.0  |
| 1981-12-07 | 68.0  |
| 1981-12-08 | 64.0  |
| 1981-12-09 | 64.0  |
| 1981-12-10 | 64.0  |
| 1981-12-11 | 62.0  |
| 1981-12-12 | 62.0  |
| 1981-12-13 | 63.0  |
| 1981-12-14 | 66.0  |
| 1981-12-15 | 73.0  |
| 1981-12-16 | 68.0  |
| 1981-12-17 | 66.0  |
| 1981-12-18 | 71.0  |
| 1981-12-19 | 84.0  |
| 1981-12-20 | 86.0  |
| 1981-12-21 | 81.0  |
| 1981-12-22 | 77.0  |
| 1981-12-23 | 76.0  |
| 1981-12-24 | 76.0  |
| 1981-12-25 | 76.0  |
| 1981-12-26 | 76.0  |
| 1981-12-27 | 76.0  |
| 1981-12-28 | 74.0  |
| 1981-12-29 | 75.0  |
| 1981-12-30 | 74.0  |
| 1981-12-31 | 72.0  |
| 1982-01-01 | 65.0  |
| 1982-01-02 | 64.0  |
| 1982-01-03 | 64.0  |
| 1982-01-04 | 66.0  |
| 1982-01-05 | 60.0  |
| 1982-01-06 | 55.0  |
| 1982-01-07 | 50.0  |
| 1982-01-08 | 51.0  |
| 1982-01-09 | 58.0  |
| 1982-01-10 | 60.0  |
| 1982-01-11 | 60.0  |
| 1982-01-12 | 68.0  |
| 1982-01-13 | 65.0  |
| 1982-01-14 | 62.0  |
| 1982-01-15 | 61.0  |
| 1982-01-16 | 61.0  |
| 1982-01-17 | 61.0  |
| 1982-01-18 | 62.0  |
| 1982-01-19 | 61.0  |
| 1982-01-20 | 61.0  |
| 1982-01-21 | 61.0  |
| 1982-01-22 | 60.0  |
| 1982-01-23 | 61.0  |
| 1982-01-24 | 60.0  |
| 1982-01-25 | 62.0  |
| 1982-01-26 | 64.0  |
| 1982-01-27 | 64.0  |
| 1982-01-28 | 64.0  |
| 1982-01-29 | 62.0  |
| 1982-01-30 | 62.0  |
| 1982-01-31 | 60.0  |
| 1982-02-01 | 59.0  |
| 1982-02-02 | 59.0  |
| 1982-02-03 | 59.0  |
| 1982-02-04 | 58.0  |
| 1982-02-05 | 55.0  |
| 1982-02-06 | 55.0  |
| 1982-02-07 | 56.0  |
| 1982-02-08 | 55.0  |
| 1982-02-09 | 55.0  |
| 1982-02-10 | 54.0  |
| 1982-02-11 | 54.0  |
| 1982-02-12 | 54.0  |
| 1982-02-13 | 57.0  |
| 1982-02-14 | 66.0  |
| 1982-02-15 | 75.0  |
| 1982-02-16 | 90.0  |
| 1982-02-17 | 92.0  |
| 1982-02-18 | 88.0  |
| 1982-02-19 | 100.0 |
| 1982-02-20 | 108.0 |
| 1982-02-21 | 134.0 |
| 1982-02-22 | 145.0 |
| 1982-02-23 | 147.0 |
| 1982-02-24 | 137.0 |
| 1982-02-25 | 135.0 |
| 1982-02-26 | 134.0 |
| 1982-02-27 | 136.0 |
| 1982-02-28 | 134.0 |
| 1982-03-01 | 138.0 |
| 1982-03-02 | 137.0 |
| 1982-03-03 | 125.0 |
| 1982-03-04 | 118.0 |
| 1982-03-05 | 111.0 |
| 1982-03-06 | 108.0 |
| 1982-03-07 | 108.0 |
| 1982-03-08 | 107.0 |
| 1982-03-09 | 105.0 |
| 1982-03-10 | 105.0 |
| 1982-03-11 | 118.0 |
| 1982-03-12 | 111.0 |
| 1982-03-13 | 110.0 |
| 1982-03-14 | 120.0 |
| 1982-03-15 | 121.0 |
| 1982-03-16 | 116.0 |
| 1982-03-17 | 118.0 |
| 1982-03-18 | 121.0 |
| 1982-03-19 | 116.0 |
| 1982-03-20 | 112.0 |
| 1982-03-21 | 110.0 |
| 1982-03-22 | 109.0 |
| 1982-03-23 | 107.0 |
| 1982-03-24 | 105.0 |
| 1982-03-25 | 104.0 |
| 1982-03-26 | 105.0 |
| 1982-03-27 | 104.0 |
| 1982-03-28 | 106.0 |
| 1982-03-29 | 109.0 |
| 1982-03-30 | 108.0 |
| 1982-03-31 | 109.0 |
| 1982-04-01 | 108.0 |
| 1982-04-02 | 108.0 |
| 1982-04-03 | 110.0 |
| 1982-04-04 | 108.0 |
| 1982-04-05 | 108.0 |
| 1982-04-06 | 107.0 |
| 1982-04-07 | 108.0 |
| 1982-04-08 | 108.0 |
| 1982-04-09 | 110.0 |
| 1982-04-10 | 122.0 |
| 1982-04-11 | 159.0 |
| 1982-04-12 | 167.0 |
| 1982-04-13 | 167.0 |
| 1982-04-14 | 176.0 |
| 1982-04-15 | 173.0 |
| 1982-04-16 | 169.0 |
| 1982-04-17 | 166.0 |
| 1982-04-18 | 161.0 |
| 1982-04-19 | 158.0 |
| 1982-04-20 | 155.0 |
| 1982-04-21 | 154.0 |
| 1982-04-22 | 155.0 |
| 1982-04-23 | 158.0 |
| 1982-04-24 | 164.0 |
| 1982-04-25 | 172.0 |
| 1982-04-26 | 179.0 |
| 1982-04-27 | 183.0 |
| 1982-04-28 | 187.0 |
| 1982-04-29 | 188.0 |
| 1982-04-30 | 190.0 |
| 1982-05-01 | 193.0 |
| 1982-05-02 | 196.0 |
| 1982-05-03 | 199.0 |
| 1982-05-04 | 199.0 |
| 1982-05-05 | 199.0 |
| 1982-05-06 | 197.0 |
| 1982-05-07 | 198.0 |
| 1982-05-08 | 200.0 |
| 1982-05-09 | 199.0 |
| 1982-05-10 | 193.0 |
| 1982-05-11 | 186.0 |
| 1982-05-12 | 181.0 |
| 1982-05-13 | 177.0 |
| 1982-05-14 | 176.0 |
| 1982-05-15 | 175.0 |
| 1982-05-16 | 174.0 |
| 1982-05-17 | 177.0 |
| 1982-05-18 | 190.0 |
| 1982-05-19 | 186.0 |
| 1982-05-20 | 179.0 |
| 1982-05-21 | 175.0 |
| 1982-05-22 | 175.0 |
| 1982-05-23 | 172.0 |
| 1982-05-24 | 167.0 |
| 1982-05-25 | 164.0 |
| 1982-05-26 | 163.0 |
| 1982-05-27 | 162.0 |
| 1982-05-28 | 159.0 |
| 1982-05-29 | 154.0 |
| 1982-05-30 | 146.0 |
| 1982-05-31 | 139.0 |
| 1982-06-01 | 136.0 |
| 1982-06-02 | 133.0 |
| 1982-06-03 | 129.0 |
| 1982-06-04 | 139.0 |
| 1982-06-05 | 142.0 |
| 1982-06-06 | 136.0 |
| 1982-06-07 | 129.0 |
| 1982-06-08 | 124.0 |
| 1982-06-09 | 120.0 |
| 1982-06-10 | 118.0 |
| 1982-06-11 | 116.0 |
| 1982-06-12 | 119.0 |
| 1982-06-13 | 121.0 |
| 1982-06-14 | 120.0 |
| 1982-06-15 | 119.0 |
| 1982-06-16 | 118.0 |
| 1982-06-17 | 118.0 |
| 1982-06-18 | 120.0 |
| 1982-06-19 | 119.0 |
| 1982-06-20 | 122.0 |
| 1982-06-21 | 123.0 |
| 1982-06-22 | 123.0 |
| 1982-06-23 | 114.0 |
| 1982-06-24 | 110.0 |
| 1982-06-25 | 107.0 |
| 1982-06-26 | 104.0 |
| 1982-06-27 | 114.0 |
| 1982-06-28 | 114.0 |
| 1982-06-29 | 123.0 |
| 1982-06-30 | 121.0 |
| 1982-07-01 | 117.0 |
| 1982-07-02 | 115.0 |
| 1982-07-03 | 126.0 |
| 1982-07-04 | 117.0 |
| 1982-07-05 | 111.0 |
| 1982-07-06 | 107.0 |
| 1982-07-07 | 110.0 |
| 1982-07-08 | 105.0 |
| 1982-07-09 | 100.0 |
| 1982-07-10 | 97.0  |
| 1982-07-11 | 94.0  |
| 1982-07-12 | 92.0  |
| 1982-07-13 | 90.0  |
| 1982-07-14 | 88.0  |
| 1982-07-15 | 86.0  |
| 1982-07-16 | 85.0  |
| 1982-07-17 | 82.0  |
| 1982-07-18 | 73.0  |
| 1982-07-19 | 71.0  |
| 1982-07-20 | 69.0  |
| 1982-07-21 | 69.0  |
| 1982-07-22 | 70.0  |
| 1982-07-23 | 70.0  |
| 1982-07-24 | 71.0  |
| 1982-07-25 | 71.0  |
| 1982-07-26 | 70.0  |
| 1982-07-27 | 70.0  |
| 1982-07-28 | 71.0  |
| 1982-07-29 | 70.0  |
| 1982-07-30 | 72.0  |
| 1982-07-31 | 71.0  |
| 1982-08-01 | 71.0  |
| 1982-08-02 | 69.0  |
| 1982-08-03 | 71.0  |
| 1982-08-04 | 72.0  |
| 1982-08-05 | 72.0  |
| 1982-08-06 | 72.0  |
| 1982-08-07 | 71.0  |
| 1982-08-08 | 71.0  |
| 1982-08-09 | 71.0  |
| 1982-08-10 | 70.0  |
| 1982-08-11 | 68.0  |
| 1982-08-12 | 68.0  |
| 1982-08-13 | 69.0  |
| 1982-08-14 | 68.0  |
| 1982-08-15 | 68.0  |
| 1982-08-16 | 69.0  |
| 1982-08-17 | 68.0  |
| 1982-08-18 | 67.0  |
| 1982-08-19 | 66.0  |
| 1982-08-20 | 66.0  |
| 1982-08-21 | 65.0  |
| 1982-08-22 | 65.0  |
| 1982-08-23 | 64.0  |
| 1982-08-24 | 63.0  |
| 1982-08-25 | 62.0  |
| 1982-08-26 | 62.0  |
| 1982-08-27 | 64.0  |
| 1982-08-28 | 63.0  |
| 1982-08-29 | 64.0  |
| 1982-08-30 | 66.0  |
| 1982-08-31 | 65.0  |
| 1982-09-01 | 65.0  |
| 1982-09-02 | 65.0  |
| 1982-09-03 | 65.0  |
| 1982-09-04 | 65.0  |
| 1982-09-05 | 65.0  |
| 1982-09-06 | 65.0  |
| 1982-09-07 | 64.0  |
| 1982-09-08 | 63.0  |
| 1982-09-09 | 64.0  |
| 1982-09-10 | 64.0  |
| 1982-09-11 | 62.0  |
| 1982-09-12 | 65.0  |
| 1982-09-13 | 65.0  |
| 1982-09-14 | 65.0  |
| 1982-09-15 | 65.0  |
| 1982-09-16 | 64.0  |
| 1982-09-17 | 64.0  |
| 1982-09-18 | 67.0  |
| 1982-09-19 | 68.0  |
| 1982-09-20 | 77.0  |
| 1982-09-21 | 73.0  |
| 1982-09-22 | 69.0  |
| 1982-09-23 | 67.0  |
| 1982-09-24 | 68.0  |
| 1982-09-25 | 67.0  |
| 1982-09-26 | 68.0  |
| 1982-09-27 | 72.0  |
| 1982-09-28 | 73.0  |
| 1982-09-29 | 72.0  |
| 1982-09-30 | 70.0  |
| 1982-10-01 | 70.0  |
| 1982-10-02 | 69.0  |
| 1982-10-03 | 68.0  |
| 1982-10-04 | 68.0  |
| 1982-10-05 | 68.0  |
| 1982-10-06 | 66.0  |
| 1982-10-07 | 66.0  |
| 1982-10-08 | 65.0  |
| 1982-10-09 | 64.0  |
| 1982-10-10 | 62.0  |
| 1982-10-11 | 61.0  |
| 1982-10-12 | 61.0  |
| 1982-10-13 | 61.0  |
| 1982-10-14 | 61.0  |
| 1982-10-15 | 61.0  |
| 1982-10-16 | 61.0  |
| 1982-10-17 | 61.0  |
| 1982-10-18 | 61.0  |
| 1982-10-19 | 61.0  |
| 1982-10-20 | 60.0  |
| 1982-10-21 | 61.0  |
| 1982-10-22 | 62.0  |
| 1982-10-23 | 65.0  |
| 1982-10-24 | 72.0  |
| 1982-10-25 | 74.0  |
| 1982-10-26 | 73.0  |
| 1982-10-27 | 69.0  |
| 1982-10-28 | 67.0  |
| 1982-10-29 | 70.0  |
| 1982-10-30 | 70.0  |
| 1982-10-31 | 67.0  |
| 1982-11-01 | 65.0  |
| 1982-11-02 | 64.0  |
| 1982-11-03 | 64.0  |
| 1982-11-04 | 64.0  |
| 1982-11-05 | 63.0  |
| 1982-11-06 | 63.0  |
| 1982-11-07 | 62.0  |
| 1982-11-08 | 63.0  |
| 1982-11-09 | 63.0  |
| 1982-11-10 | 63.0  |
| 1982-11-11 | 63.0  |
| 1982-11-12 | 63.0  |
| 1982-11-13 | 62.0  |
| 1982-11-14 | 61.0  |
| 1982-11-15 | 61.0  |
| 1982-11-16 | 61.0  |
| 1982-11-17 | 63.0  |
| 1982-11-18 | 65.0  |
| 1982-11-19 | 65.0  |
| 1982-11-20 | 65.0  |
| 1982-11-21 | 65.0  |
| 1982-11-22 | 65.0  |
| 1982-11-23 | 64.0  |
| 1982-11-24 | 63.0  |
| 1982-11-25 | 62.0  |
| 1982-11-26 | 62.0  |
| 1982-11-27 | 63.0  |
| 1982-11-28 | 65.0  |
| 1982-11-29 | 68.0  |
| 1982-11-30 | 65.0  |
| 1982-12-01 | 64.0  |
| 1982-12-02 | 64.0  |
| 1982-12-03 | 65.0  |
| 1982-12-04 | 67.0  |
| 1982-12-05 | 68.0  |
| 1982-12-06 | 68.0  |
| 1982-12-07 | 65.0  |
| 1982-12-08 | 63.0  |
| 1982-12-09 | 62.0  |
| 1982-12-10 | 61.0  |
| 1982-12-11 | 61.0  |
| 1982-12-12 | 61.0  |
| 1982-12-13 | 61.0  |
| 1982-12-14 | 61.0  |
| 1982-12-15 | 63.0  |
| 1982-12-16 | 72.0  |
| 1982-12-17 | 75.0  |
| 1982-12-18 | 70.0  |
| 1982-12-19 | 69.0  |
| 1982-12-20 | 69.0  |
| 1982-12-21 | 70.0  |
| 1982-12-22 | 69.0  |
| 1982-12-23 | 68.0  |
| 1982-12-24 | 58.0  |
| 1982-12-25 | 58.0  |
| 1982-12-26 | 58.0  |
| 1982-12-27 | 64.0  |
| 1982-12-28 | 58.0  |
| 1982-12-29 | 55.0  |
| 1982-12-30 | 55.0  |
| 1982-12-31 | 55.0  |
| 1983-01-01 | 55.0  |
| 1983-01-02 | 55.0  |
| 1983-01-03 | 56.0  |
| 1983-01-04 | 58.0  |
| 1983-01-05 | 64.0  |
| 1983-01-06 | 64.0  |
| 1983-01-07 | 64.0  |
| 1983-01-08 | 62.0  |
| 1983-01-09 | 60.0  |
| 1983-01-10 | 58.0  |
| 1983-01-11 | 58.0  |
| 1983-01-12 | 58.0  |
| 1983-01-13 | 58.0  |
| 1983-01-14 | 58.0  |
| 1983-01-15 | 62.0  |
| 1983-01-16 | 66.0  |
| 1983-01-17 | 66.0  |
| 1983-01-18 | 66.0  |
| 1983-01-19 | 66.0  |
| 1983-01-20 | 64.0  |
| 1983-01-21 | 64.0  |
| 1983-01-22 | 64.0  |
| 1983-01-23 | 70.0  |
| 1983-01-24 | 75.0  |
| 1983-01-25 | 80.0  |
| 1983-01-26 | 80.0  |
| 1983-01-27 | 80.0  |
| 1983-01-28 | 80.0  |
| 1983-01-29 | 80.0  |
| 1983-01-30 | 78.0  |
| 1983-01-31 | 78.0  |
| 1983-02-01 | 74.0  |
| 1983-02-02 | 73.0  |
| 1983-02-03 | 71.0  |
| 1983-02-04 | 70.0  |
| 1983-02-05 | 70.0  |
| 1983-02-06 | 70.0  |
| 1983-02-07 | 70.0  |
| 1983-02-08 | 70.0  |
| 1983-02-09 | 70.0  |
| 1983-02-10 | 71.0  |
| 1983-02-11 | 72.0  |
| 1983-02-12 | 77.0  |
| 1983-02-13 | 79.0  |
| 1983-02-14 | 79.0  |
| 1983-02-15 | 79.0  |
| 1983-02-16 | 80.0  |
| 1983-02-17 | 82.0  |
| 1983-02-18 | 100.0 |
| 1983-02-19 | 95.0  |
| 1983-02-20 | 89.0  |
| 1983-02-21 | 93.0  |
| 1983-02-22 | 101.0 |
| 1983-02-23 | 101.0 |
| 1983-02-24 | 99.0  |
| 1983-02-25 | 99.0  |
| 1983-02-26 | 95.0  |
| 1983-02-27 | 93.0  |
| 1983-02-28 | 95.0  |
| 1983-03-01 | 97.0  |
| 1983-03-02 | 98.0  |
| 1983-03-03 | 98.0  |
| 1983-03-04 | 98.0  |
| 1983-03-05 | 100.0 |
| 1983-03-06 | 101.0 |
| 1983-03-07 | 100.0 |
| 1983-03-08 | 100.0 |
| 1983-03-09 | 101.0 |
| 1983-03-10 | 105.0 |
| 1983-03-11 | 111.0 |
| 1983-03-12 | 117.0 |
| 1983-03-13 | 130.0 |
| 1983-03-14 | 134.0 |
| 1983-03-15 | 132.0 |
| 1983-03-16 | 128.0 |
| 1983-03-17 | 130.0 |
| 1983-03-18 | 128.0 |
| 1983-03-19 | 124.0 |
| 1983-03-20 | 121.0 |
| 1983-03-21 | 123.0 |
| 1983-03-22 | 124.0 |
| 1983-03-23 | 124.0 |
| 1983-03-24 | 124.0 |
| 1983-03-25 | 126.0 |
| 1983-03-26 | 121.0 |
| 1983-03-27 | 123.0 |
| 1983-03-28 | 125.0 |
| 1983-03-29 | 125.0 |
| 1983-03-30 | 178.0 |
| 1983-03-31 | 193.0 |
| 1983-04-01 | 192.0 |
| 1983-04-02 | 196.0 |
| 1983-04-03 | 194.0 |
| 1983-04-04 | 188.0 |
| 1983-04-05 | 183.0 |
| 1983-04-06 | 177.0 |
| 1983-04-07 | 174.0 |
| 1983-04-08 | 171.0 |
| 1983-04-09 | 170.0 |
| 1983-04-10 | 167.0 |
| 1983-04-11 | 165.0 |
| 1983-04-12 | 162.0 |
| 1983-04-13 | 160.0 |
| 1983-04-14 | 158.0 |
| 1983-04-15 | 155.0 |
| 1983-04-16 | 152.0 |
| 1983-04-17 | 151.0 |
| 1983-04-18 | 152.0 |
| 1983-04-19 | 155.0 |
| 1983-04-20 | 158.0 |
| 1983-04-21 | 169.0 |
| 1983-04-22 | 169.0 |
| 1983-04-23 | 172.0 |
| 1983-04-24 | 180.0 |
| 1983-04-25 | 185.0 |
| 1983-04-26 | 185.0 |
| 1983-04-27 | 181.0 |
| 1983-04-28 | 180.0 |
| 1983-04-29 | 179.0 |
| 1983-04-30 | 176.0 |
| 1983-05-01 | 179.0 |
| 1983-05-02 | 180.0 |
| 1983-05-03 | 180.0 |
| 1983-05-04 | 185.0 |
| 1983-05-05 | 185.0 |
| 1983-05-06 | 185.0 |
| 1983-05-07 | 180.0 |
| 1983-05-08 | 180.0 |
| 1983-05-09 | 185.0 |
| 1983-05-10 | 185.0 |
| 1983-05-11 | 185.0 |
| 1983-05-12 | 180.0 |
| 1983-05-13 | 175.0 |
| 1983-05-14 | 170.0 |
| 1983-05-15 | 165.0 |
| 1983-05-16 | 165.0 |
| 1983-05-17 | 165.0 |
| 1983-05-18 | 165.0 |
| 1983-05-19 | 165.0 |
| 1983-05-20 | 165.0 |
| 1983-05-21 | 170.0 |
| 1983-05-22 | 170.0 |
| 1983-05-23 | 175.0 |
| 1983-05-24 | 180.0 |
| 1983-05-25 | 185.0 |
| 1983-05-26 | 190.0 |
| 1983-05-27 | 200.0 |
| 1983-05-28 | 205.0 |
| 1983-05-29 | 210.0 |
| 1983-05-30 | 210.0 |
| 1983-05-31 | 210.0 |
| 1983-06-01 | 210.0 |
| 1983-06-02 | 205.0 |
| 1983-06-03 | 205.0 |
| 1983-06-04 | 200.0 |
| 1983-06-05 | 195.0 |
| 1983-06-06 | 190.0 |
| 1983-06-07 | 180.0 |
| 1983-06-08 | 175.0 |
| 1983-06-09 | 170.0 |
| 1983-06-10 | 165.0 |
| 1983-06-11 | 160.0 |
| 1983-06-12 | 155.0 |
| 1983-06-13 | 150.0 |
| 1983-06-14 | 140.0 |
| 1983-06-15 | 135.0 |
| 1983-06-16 | 130.0 |
| 1983-06-17 | 125.0 |
| 1983-06-18 | 120.0 |
| 1983-06-19 | 115.0 |
| 1983-06-20 | 110.0 |
| 1983-06-21 | 107.0 |
| 1983-06-22 | 104.0 |
| 1983-06-23 | 102.0 |
| 1983-06-24 | 99.0  |
| 1983-06-25 | 98.0  |
| 1983-06-26 | 96.0  |
| 1983-06-27 | 96.0  |
| 1983-06-28 | 96.0  |
| 1983-06-29 | 95.0  |
| 1983-06-30 | 94.0  |
| 1983-07-01 | 99.0  |
| 1983-07-02 | 105.0 |
| 1983-07-03 | 101.0 |
| 1983-07-04 | 99.0  |
| 1983-07-05 | 94.0  |
| 1983-07-06 | 92.0  |
| 1983-07-07 | 91.0  |
| 1983-07-08 | 91.0  |
| 1983-07-09 | 90.0  |
| 1983-07-10 | 89.0  |
| 1983-07-11 | 88.0  |
| 1983-07-12 | 86.0  |
| 1983-07-13 | 86.0  |
| 1983-07-14 | 85.0  |
| 1983-07-15 | 85.0  |
| 1983-07-16 | 84.0  |
| 1983-07-17 | 85.0  |
| 1983-07-18 | 84.0  |
| 1983-07-19 | 81.0  |
| 1983-07-20 | 80.0  |
| 1983-07-21 | 80.0  |
| 1983-07-22 | 79.0  |
| 1983-07-23 | 79.0  |
| 1983-07-24 | 78.0  |
| 1983-07-25 | 78.0  |
| 1983-07-26 | 78.0  |
| 1983-07-27 | 77.0  |
| 1983-07-28 | 77.0  |
| 1983-07-29 | 76.0  |
| 1983-07-30 | 76.0  |
| 1983-07-31 | 76.0  |
| 1983-08-01 | 75.0  |
| 1983-08-02 | 74.0  |
| 1983-08-03 | 75.0  |
| 1983-08-04 | 75.0  |
| 1983-08-05 | 74.0  |
| 1983-08-06 | 74.0  |
| 1983-08-07 | 74.0  |
| 1983-08-08 | 74.0  |
| 1983-08-09 | 74.0  |
| 1983-08-10 | 72.0  |
| 1983-08-11 | 69.0  |
| 1983-08-12 | 68.0  |
| 1983-08-13 | 68.0  |
| 1983-08-14 | 69.0  |
| 1983-08-15 | 69.0  |
| 1983-08-16 | 67.0  |
| 1983-08-17 | 65.0  |
| 1983-08-18 | 68.0  |
| 1983-08-19 | 70.0  |
| 1983-08-20 | 71.0  |
| 1983-08-21 | 70.0  |
| 1983-08-22 | 70.0  |
| 1983-08-23 | 72.0  |
| 1983-08-24 | 74.0  |
| 1983-08-25 | 74.0  |
| 1983-08-26 | 73.0  |
| 1983-08-27 | 71.0  |
| 1983-08-28 | 71.0  |
| 1983-08-29 | 71.0  |
| 1983-08-30 | 72.0  |
| 1983-08-31 | 71.0  |
| 1983-09-01 | 73.0  |
| 1983-09-02 | 72.0  |
| 1983-09-03 | 71.0  |
| 1983-09-04 | 70.0  |
| 1983-09-05 | 68.0  |
| 1983-09-06 | 69.0  |
| 1983-09-07 | 69.0  |
| 1983-09-08 | 69.0  |
| 1983-09-09 | 69.0  |
| 1983-09-10 | 68.0  |
| 1983-09-11 | 68.0  |
| 1983-09-12 | 70.0  |
| 1983-09-13 | 70.0  |
| 1983-09-14 | 70.0  |
| 1983-09-15 | 69.0  |
| 1983-09-16 | 70.0  |
| 1983-09-17 | 70.0  |
| 1983-09-18 | 69.0  |
| 1983-09-19 | 70.0  |
| 1983-09-20 | 70.0  |
| 1983-09-21 | 69.0  |
| 1983-09-22 | 70.0  |
| 1983-09-23 | 71.0  |
| 1983-09-24 | 72.0  |
| 1983-09-25 | 71.0  |
| 1983-09-26 | 71.0  |
| 1983-09-27 | 71.0  |
| 1983-09-28 | 69.0  |
| 1983-09-29 | 69.0  |
| 1983-09-30 | 70.0  |
| 1983-10-01 | 70.0  |
| 1983-10-02 | 70.0  |
| 1983-10-03 | 70.0  |
| 1983-10-04 | 70.0  |
| 1983-10-05 | 69.0  |
| 1983-10-06 | 69.0  |
| 1983-10-07 | 71.0  |
| 1983-10-08 | 71.0  |
| 1983-10-09 | 73.0  |
| 1983-10-10 | 73.0  |
| 1983-10-11 | 72.0  |
| 1983-10-12 | 71.0  |
| 1983-10-13 | 71.0  |
| 1983-10-14 | 71.0  |
| 1983-10-15 | 71.0  |
| 1983-10-16 | 70.0  |
| 1983-10-17 | 70.0  |
| 1983-10-18 | 70.0  |
| 1983-10-19 | 70.0  |
| 1983-10-20 | 70.0  |
| 1983-10-21 | 70.0  |
| 1983-10-22 | 70.0  |
| 1983-10-23 | 72.0  |
| 1983-10-24 | 71.0  |
| 1983-10-25 | 70.0  |
| 1983-10-26 | 70.0  |
| 1983-10-27 | 70.0  |
| 1983-10-28 | 70.0  |
| 1983-10-29 | 69.0  |
| 1983-10-30 | 71.0  |
| 1983-10-31 | 71.0  |
| 1983-11-01 | 72.0  |
| 1983-11-02 | 73.0  |
| 1983-11-03 | 73.0  |
| 1983-11-04 | 73.0  |
| 1983-11-05 | 71.0  |
| 1983-11-06 | 73.0  |
| 1983-11-07 | 72.0  |
| 1983-11-08 | 70.0  |
| 1983-11-09 | 72.0  |
| 1983-11-10 | 72.0  |
| 1983-11-11 | 73.0  |
| 1983-11-12 | 73.0  |
| 1983-11-13 | 74.0  |
| 1983-11-14 | 74.0  |
| 1983-11-15 | 74.0  |
| 1983-11-16 | 75.0  |
| 1983-11-17 | 81.0  |
| 1983-11-18 | 78.0  |
| 1983-11-19 | 78.0  |
| 1983-11-20 | 82.0  |
| 1983-11-21 | 78.0  |
| 1983-11-22 | 77.0  |
| 1983-11-23 | 76.0  |
| 1983-11-24 | 78.0  |
| 1983-11-25 | 78.0  |
| 1983-11-26 | 75.0  |
| 1983-11-27 | 75.0  |
| 1983-11-28 | 74.0  |
| 1983-11-29 | 73.0  |
| 1983-11-30 | 73.0  |
| 1983-12-01 | 75.0  |
| 1983-12-02 | 75.0  |
| 1983-12-03 | 75.0  |
| 1983-12-04 | 74.0  |
| 1983-12-05 | 74.0  |
| 1983-12-06 | 75.0  |
| 1983-12-07 | 78.0  |
| 1983-12-08 | 79.0  |
| 1983-12-09 | 79.0  |
| 1983-12-10 | 84.0  |
| 1983-12-11 | 84.0  |
| 1983-12-12 | 81.0  |
| 1983-12-13 | 81.0  |
| 1983-12-14 | 85.0  |
| 1983-12-15 | 93.0  |
| 1983-12-16 | 89.0  |
| 1983-12-17 | 91.0  |
| 1983-12-18 | 92.0  |
| 1983-12-19 | 93.0  |
| 1983-12-20 | 90.0  |
| 1983-12-21 | 80.0  |
| 1983-12-22 | 70.0  |
| 1983-12-23 | 65.0  |
| 1983-12-24 | 58.0  |
| 1983-12-25 | 60.0  |
| 1983-12-26 | 75.0  |
| 1983-12-27 | 85.0  |
| 1983-12-28 | 80.0  |
| 1983-12-29 | 65.0  |
| 1983-12-30 | 75.0  |
| 1983-12-31 | 78.0  |
| 1984-01-01 | 76.0  |
| 1984-01-02 | 75.0  |
| 1984-01-03 | 74.0  |
| 1984-01-04 | 73.0  |
| 1984-01-05 | 73.0  |
| 1984-01-06 | 72.0  |
| 1984-01-07 | 72.0  |
| 1984-01-08 | 72.0  |
| 1984-01-09 | 71.0  |
| 1984-01-10 | 71.0  |
| 1984-01-11 | 71.0  |
| 1984-01-12 | 70.0  |
| 1984-01-13 | 70.0  |
| 1984-01-14 | 69.0  |
| 1984-01-15 | 67.0  |
| 1984-01-16 | 65.0  |
| 1984-01-17 | 68.0  |
| 1984-01-18 | 68.0  |
| 1984-01-19 | 65.0  |
| 1984-01-20 | 65.0  |
| 1984-01-21 | 75.0  |
| 1984-01-22 | 78.0  |
| 1984-01-23 | 78.0  |
| 1984-01-24 | 79.0  |
| 1984-01-25 | 80.0  |
| 1984-01-26 | 79.0  |
| 1984-01-27 | 79.0  |
| 1984-01-28 | 79.0  |
| 1984-01-29 | 78.0  |
| 1984-01-30 | 78.0  |
| 1984-01-31 | 78.0  |
| 1984-02-01 | 78.0  |
| 1984-02-02 | 77.0  |
| 1984-02-03 | 77.0  |
| 1984-02-04 | 77.0  |
| 1984-02-05 | 77.0  |
| 1984-02-06 | 79.0  |
| 1984-02-07 | 79.0  |
| 1984-02-08 | 79.0  |
| 1984-02-09 | 81.0  |
| 1984-02-10 | 81.0  |
| 1984-02-11 | 80.0  |
| 1984-02-12 | 81.0  |
| 1984-02-13 | 87.0  |
| 1984-02-14 | 90.0  |
| 1984-02-15 | 89.0  |
| 1984-02-16 | 87.0  |
| 1984-02-17 | 83.0  |
| 1984-02-18 | 82.0  |
| 1984-02-19 | 82.0  |
| 1984-02-20 | 83.0  |
| 1984-02-21 | 86.0  |
| 1984-02-22 | 85.0  |
| 1984-02-23 | 84.0  |
| 1984-02-24 | 83.0  |
| 1984-02-25 | 82.0  |
| 1984-02-26 | 80.0  |
| 1984-02-27 | 81.0  |
| 1984-02-28 | 82.0  |
| 1984-02-29 | 83.0  |
| 1984-03-01 | 85.0  |
| 1984-03-02 | 87.0  |
| 1984-03-03 | 87.0  |
| 1984-03-04 | 88.0  |
| 1984-03-05 | 88.0  |
| 1984-03-06 | 89.0  |
| 1984-03-07 | 91.0  |
| 1984-03-08 | 93.0  |
| 1984-03-09 | 95.0  |
| 1984-03-10 | 96.0  |
| 1984-03-11 | 97.0  |
| 1984-03-12 | 96.0  |
| 1984-03-13 | 100.0 |
| 1984-03-14 | 103.0 |
| 1984-03-15 | 109.0 |
| 1984-03-16 | 110.0 |
| 1984-03-17 | 110.0 |
| 1984-03-18 | 108.0 |
| 1984-03-19 | 109.0 |
| 1984-03-20 | 110.0 |
| 1984-03-21 | 115.0 |
| 1984-03-22 | 117.0 |
| 1984-03-23 | 117.0 |
| 1984-03-24 | 119.0 |
| 1984-03-25 | 120.0 |
| 1984-03-26 | 127.0 |
| 1984-03-27 | 124.0 |
| 1984-03-28 | 125.0 |
| 1984-03-29 | 127.0 |
| 1984-03-30 | 125.0 |
| 1984-03-31 | 127.0 |
| 1984-04-01 | 134.0 |
| 1984-04-02 | 131.0 |
| 1984-04-03 | 128.0 |
| 1984-04-04 | 132.0 |
| 1984-04-05 | 138.0 |
| 1984-04-06 | 140.0 |
| 1984-04-07 | 135.0 |
| 1984-04-08 | 145.0 |
| 1984-04-09 | 145.0 |
| 1984-04-10 | 147.0 |
| 1984-04-11 | 150.0 |
| 1984-04-12 | 146.0 |
| 1984-04-13 | 143.0 |
| 1984-04-14 | 139.0 |
| 1984-04-15 | 141.0 |
| 1984-04-16 | 150.0 |
| 1984-04-17 | 162.0 |
| 1984-04-18 | 167.0 |
| 1984-04-19 | 171.0 |
| 1984-04-20 | 169.0 |
| 1984-04-21 | 164.0 |
| 1984-04-22 | 163.0 |
| 1984-04-23 | 166.0 |
| 1984-04-24 | 171.0 |
| 1984-04-25 | 169.0 |
| 1984-04-26 | 164.0 |
| 1984-04-27 | 161.0 |
| 1984-04-28 | 156.0 |
| 1984-04-29 | 156.0 |
| 1984-04-30 | 158.0 |
| 1984-05-01 | 159.0 |
| 1984-05-02 | 161.0 |
| 1984-05-03 | 162.0 |
| 1984-05-04 | 170.0 |
| 1984-05-05 | 170.0 |
| 1984-05-06 | 167.0 |
| 1984-05-07 | 162.0 |
| 1984-05-08 | 162.0 |
| 1984-05-09 | 163.0 |
| 1984-05-10 | 169.0 |
| 1984-05-11 | 176.0 |
| 1984-05-12 | 187.0 |
| 1984-05-13 | 190.0 |
| 1984-05-14 | 191.0 |
| 1984-05-15 | 191.0 |
| 1984-05-16 | 187.0 |
| 1984-05-17 | 185.0 |
| 1984-05-18 | 180.0 |
| 1984-05-19 | 175.0 |
| 1984-05-20 | 175.0 |
| 1984-05-21 | 170.0 |
| 1984-05-22 | 170.0 |
| 1984-05-23 | 172.0 |
| 1984-05-24 | 176.0 |
| 1984-05-25 | 180.0 |
| 1984-05-26 | 178.0 |
| 1984-05-27 | 174.0 |
| 1984-05-28 | 168.0 |
| 1984-05-29 | 162.0 |
| 1984-05-30 | 155.0 |
| 1984-05-31 | 145.0 |
| 1984-06-01 | 140.0 |
| 1984-06-02 | 137.0 |
| 1984-06-03 | 135.0 |
| 1984-06-04 | 135.0 |
| 1984-06-05 | 138.0 |
| 1984-06-06 | 140.0 |
| 1984-06-07 | 140.0 |
| 1984-06-08 | 140.0 |
| 1984-06-09 | 135.0 |
| 1984-06-10 | 135.0 |
| 1984-06-11 | 130.0 |
| 1984-06-12 | 125.0 |
| 1984-06-13 | 125.0 |
| 1984-06-14 | 120.0 |
| 1984-06-15 | 115.0 |
| 1984-06-16 | 110.0 |
| 1984-06-17 | 107.0 |
| 1984-06-18 | 103.0 |
| 1984-06-19 | 100.0 |
| 1984-06-20 | 96.0  |
| 1984-06-21 | 94.0  |
| 1984-06-22 | 92.0  |
| 1984-06-23 | 90.0  |
| 1984-06-24 | 89.0  |
| 1984-06-25 | 87.0  |
| 1984-06-26 | 86.0  |
| 1984-06-27 | 85.0  |
| 1984-06-28 | 84.0  |
| 1984-06-29 | 83.0  |
| 1984-06-30 | 83.0  |
| 1984-07-01 | 82.0  |
| 1984-07-02 | 82.0  |
| 1984-07-03 | 81.0  |
| 1984-07-04 | 81.0  |
| 1984-07-05 | 80.0  |
| 1984-07-06 | 79.0  |
| 1984-07-07 | 78.0  |
| 1984-07-08 | 77.0  |
| 1984-07-09 | 77.0  |
| 1984-07-10 | 76.0  |
| 1984-07-11 | 75.0  |
| 1984-07-12 | 75.0  |
| 1984-07-13 | 74.0  |
| 1984-07-14 | 74.0  |
| 1984-07-15 | 74.0  |
| 1984-07-16 | 73.0  |
| 1984-07-17 | 74.0  |
| 1984-07-18 | 73.0  |
| 1984-07-19 | 73.0  |
| 1984-07-20 | 72.0  |
| 1984-07-21 | 72.0  |
| 1984-07-22 | 72.0  |
| 1984-07-23 | 72.0  |
| 1984-07-24 | 72.0  |
| 1984-07-25 | 72.0  |
| 1984-07-26 | 71.0  |
| 1984-07-27 | 69.0  |
| 1984-07-28 | 70.0  |
| 1984-07-29 | 72.0  |
| 1984-07-30 | 72.0  |
| 1984-07-31 | 72.0  |
| 1984-08-01 | 71.0  |
| 1984-08-02 | 69.0  |
| 1984-08-03 | 71.0  |
| 1984-08-04 | 71.0  |
| 1984-08-05 | 70.0  |
| 1984-08-06 | 70.0  |
| 1984-08-07 | 69.0  |
| 1984-08-08 | 69.0  |
| 1984-08-09 | 68.0  |
| 1984-08-10 | 68.0  |
| 1984-08-11 | 67.0  |
| 1984-08-12 | 63.0  |
| 1984-08-13 | 64.0  |
| 1984-08-14 | 65.0  |
| 1984-08-15 | 65.0  |
| 1984-08-16 | 64.0  |
| 1984-08-17 | 64.0  |
| 1984-08-18 | 63.0  |
| 1984-08-19 | 62.0  |
| 1984-08-20 | 64.0  |
| 1984-08-21 | 64.0  |
| 1984-08-22 | 65.0  |
| 1984-08-23 | 63.0  |
| 1984-08-24 | 63.0  |
| 1984-08-25 | 65.0  |
| 1984-08-26 | 65.0  |
| 1984-08-27 | 63.0  |
| 1984-08-28 | 62.0  |
| 1984-08-29 | 64.0  |
| 1984-08-30 | 72.0  |
| 1984-08-31 | 84.0  |
| 1984-09-01 | 73.0  |
| 1984-09-02 | 69.0  |
| 1984-09-03 | 68.0  |
| 1984-09-04 | 68.0  |
| 1984-09-05 | 68.0  |
| 1984-09-06 | 68.0  |
| 1984-09-07 | 68.0  |
| 1984-09-08 | 68.0  |
| 1984-09-09 | 68.0  |
| 1984-09-10 | 68.0  |
| 1984-09-11 | 68.0  |
| 1984-09-12 | 69.0  |
| 1984-09-13 | 69.0  |
| 1984-09-14 | 69.0  |
| 1984-09-15 | 70.0  |
| 1984-09-16 | 70.0  |
| 1984-09-17 | 69.0  |
| 1984-09-18 | 69.0  |
| 1984-09-19 | 69.0  |
| 1984-09-20 | 71.0  |
| 1984-09-21 | 70.0  |
| 1984-09-22 | 69.0  |
| 1984-09-23 | 73.0  |
| 1984-09-24 | 74.0  |
| 1984-09-25 | 74.0  |
| 1984-09-26 | 74.0  |
| 1984-09-27 | 74.0  |
| 1984-09-28 | 74.0  |
| 1984-09-29 | 73.0  |
| 1984-09-30 | 74.0  |
| 1984-10-01 | 75.5  |
| 1984-10-02 | 73.9  |
| 1984-10-03 | 73.0  |
| 1984-10-04 | 72.6  |
| 1984-10-05 | 72.5  |
| 1984-10-06 | 72.3  |
| 1984-10-07 | 71.7  |
| 1984-10-08 | 71.6  |
| 1984-10-09 | 71.2  |
| 1984-10-10 | 70.8  |
| 1984-10-11 | 75.7  |
| 1984-10-12 | 73.5  |
| 1984-10-13 | 73.4  |
| 1984-10-14 | 73.1  |
| 1984-10-15 | 76.3  |
| 1984-10-16 | 75.6  |
| 1984-10-17 | 75.1  |
| 1984-10-18 | 73.6  |
| 1984-10-19 | 74.4  |
| 1984-10-20 | 74.4  |
| 1984-10-21 | 73.6  |
| 1984-10-22 | 72.5  |
| 1984-10-23 | 71.9  |
| 1984-10-24 | 72.9  |
| 1984-10-25 | 71.7  |
| 1984-10-26 | 72.7  |
| 1984-10-27 | 73.0  |
| 1984-10-28 | 73.3  |
| 1984-10-29 | 73.5  |
| 1984-10-30 | 71.7  |
| 1984-10-31 | 71.3  |
| 1984-11-01 | 71.1  |
| 1984-11-02 | 77.1  |
| 1984-11-03 | 82.8  |
| 1984-11-04 | 77.3  |
| 1984-11-05 | 74.7  |
| 1984-11-06 | 75.1  |
| 1984-11-07 | 75.1  |
| 1984-11-08 | 74.3  |
| 1984-11-09 | 74.4  |
| 1984-11-10 | 76.5  |
| 1984-11-11 | 81.2  |
| 1984-11-12 | 84.3  |
| 1984-11-13 | 80.5  |
| 1984-11-14 | 78.5  |
| 1984-11-15 | 77.4  |
| 1984-11-16 | 78.0  |
| 1984-11-17 | 76.8  |
| 1984-11-18 | 78.7  |
| 1984-11-19 | 79.1  |
| 1984-11-20 | 88.2  |
| 1984-11-21 | 88.1  |
| 1984-11-22 | 81.8  |
| 1984-11-23 | 79.3  |
| 1984-11-24 | 82.1  |
| 1984-11-25 | 78.7  |
| 1984-11-26 | 77.2  |
| 1984-11-27 | 77.4  |
| 1984-11-28 | 78.1  |
| 1984-11-29 | 76.2  |
| 1984-11-30 | 76.0  |
| 1984-12-01 | 74.4  |
| 1984-12-02 | 73.3  |
| 1984-12-03 | 74.9  |
| 1984-12-04 | 73.6  |
| 1984-12-05 | 72.0  |
| 1984-12-06 | 73.4  |
| 1984-12-07 | 72.6  |
| 1984-12-08 | 72.4  |
| 1984-12-09 | 72.7  |
| 1984-12-10 | 73.4  |
| 1984-12-11 | 73.2  |
| 1984-12-12 | 73.7  |
| 1984-12-13 | 73.0  |
| 1984-12-14 | 73.0  |
| 1984-12-15 | 72.0  |
| 1984-12-16 | 72.0  |
| 1984-12-17 | 78.0  |
| 1984-12-18 | 71.8  |
| 1984-12-19 | 70.0  |
| 1984-12-20 | 68.0  |
| 1984-12-21 | 68.0  |
| 1984-12-22 | 76.0  |
| 1984-12-23 | 71.3  |
| 1984-12-24 | 71.0  |
| 1984-12-25 | 71.0  |
| 1984-12-26 | 71.3  |
| 1984-12-27 | 68.5  |
| 1984-12-28 | 68.6  |
| 1984-12-29 | 68.4  |
| 1984-12-30 | 69.2  |
| 1984-12-31 | 67.5  |
| 1985-01-01 | 66.0  |
| 1985-01-02 | 66.0  |
| 1985-01-03 | 68.0  |
| 1985-01-04 | 72.0  |
| 1985-01-05 | 76.0  |
| 1985-01-06 | 83.0  |
| 1985-01-07 | 83.0  |
| 1985-01-08 | 83.1  |
| 1985-01-09 | 83.0  |
| 1985-01-10 | 82.3  |
| 1985-01-11 | 82.2  |
| 1985-01-12 | 82.4  |
| 1985-01-13 | 81.0  |
| 1985-01-14 | 81.0  |
| 1985-01-15 | 81.3  |
| 1985-01-16 | 80.7  |
| 1985-01-17 | 80.7  |
| 1985-01-18 | 81.1  |
| 1985-01-19 | 80.7  |
| 1985-01-20 | 80.8  |
| 1985-01-21 | 80.4  |
| 1985-01-22 | 80.3  |
| 1985-01-23 | 80.0  |
| 1985-01-24 | 80.2  |
| 1985-01-25 | 80.0  |
| 1985-01-26 | 80.0  |
| 1985-01-27 | 80.0  |
| 1985-01-28 | 80.1  |
| 1985-01-29 | 80.0  |
| 1985-01-30 | 80.5  |
| 1985-01-31 | 79.9  |
| 1985-02-01 | 79.8  |
| 1985-02-02 | 80.0  |
| 1985-02-03 | 80.0  |
| 1985-02-04 | 79.4  |
| 1985-02-05 | 79.5  |
| 1985-02-06 | 79.5  |
| 1985-02-07 | 80.1  |
| 1985-02-08 | 81.2  |
| 1985-02-09 | 80.1  |
| 1985-02-10 | 79.6  |
| 1985-02-11 | 80.0  |
| 1985-02-12 | 80.1  |
| 1985-02-13 | 80.0  |
| 1985-02-14 | 79.9  |
| 1985-02-15 | 80.0  |
| 1985-02-16 | 80.0  |
| 1985-02-17 | 79.9  |
| 1985-02-18 | 79.6  |
| 1985-02-19 | 80.0  |
| 1985-02-20 | 80.0  |
| 1985-02-21 | 79.7  |
| 1985-02-22 | 80.0  |
| 1985-02-23 | 80.1  |
| 1985-02-24 | 80.3  |
| 1985-02-25 | 80.2  |
| 1985-02-26 | 80.0  |
| 1985-02-27 | 79.8  |
| 1985-02-28 | 80.3  |
| 1985-03-01 | 80.5  |
| 1985-03-02 | 80.0  |
| 1985-03-03 | 79.7  |
| 1985-03-04 | 80.6  |
| 1985-03-05 | 80.0  |
| 1985-03-06 | 80.0  |
| 1985-03-07 | 79.6  |
| 1985-03-08 | 79.6  |
| 1985-03-09 | 79.7  |
| 1985-03-10 | 80.2  |
| 1985-03-11 | 80.3  |
| 1985-03-12 | 80.5  |
| 1985-03-13 | 80.7  |
| 1985-03-14 | 81.2  |
| 1985-03-15 | 82.4  |
| 1985-03-16 | 83.6  |
| 1985-03-17 | 84.5  |
| 1985-03-18 | 85.7  |
| 1985-03-19 | 87.2  |
| 1985-03-20 | 88.8  |
| 1985-03-21 | 91.0  |
| 1985-03-22 | 90.4  |
| 1985-03-23 | 91.6  |
| 1985-03-24 | 93.4  |
| 1985-03-25 | 93.6  |
| 1985-03-26 | 93.1  |
| 1985-03-27 | 92.3  |
| 1985-03-28 | 90.4  |
| 1985-03-29 | 89.2  |
| 1985-03-30 | 89.1  |
| 1985-03-31 | 91.4  |
| 1985-04-01 | 95.8  |
| 1985-04-02 | 99.4  |
| 1985-04-03 | 99.6  |
| 1985-04-04 | 98.3  |
| 1985-04-05 | 98.0  |
| 1985-04-06 | 97.5  |
| 1985-04-07 | 97.5  |
| 1985-04-08 | 99.0  |
| 1985-04-09 | 101.0 |
| 1985-04-10 | 102.0 |
| 1985-04-11 | 104.0 |
| 1985-04-12 | 105.0 |
| 1985-04-13 | 107.0 |
| 1985-04-14 | 108.0 |
| 1985-04-15 | 111.0 |
| 1985-04-16 | 114.0 |
| 1985-04-17 | 112.0 |
| 1985-04-18 | 109.0 |
| 1985-04-19 | 110.0 |
| 1985-04-20 | 107.0 |
| 1985-04-21 | 107.0 |
| 1985-04-22 | 108.0 |
| 1985-04-23 | 102.0 |
| 1985-04-24 | 97.6  |
| 1985-04-25 | 95.5  |
| 1985-04-26 | 92.9  |
| 1985-04-27 | 92.4  |
| 1985-04-28 | 91.8  |
| 1985-04-29 | 91.5  |
| 1985-04-30 | 91.1  |
| 1985-05-01 | 90.6  |
| 1985-05-02 | 91.2  |
| 1985-05-03 | 91.1  |
| 1985-05-04 | 90.6  |
| 1985-05-05 | 85.9  |
| 1985-05-06 | 83.1  |
| 1985-05-07 | 81.9  |
| 1985-05-08 | 81.8  |
| 1985-05-09 | 81.1  |
| 1985-05-10 | 76.7  |
| 1985-05-11 | 71.7  |
| 1985-05-12 | 68.9  |
| 1985-05-13 | 67.6  |
| 1985-05-14 | 66.6  |
| 1985-05-15 | 65.9  |
| 1985-05-16 | 66.1  |
| 1985-05-17 | 67.4  |
| 1985-05-18 | 67.9  |
| 1985-05-19 | 72.8  |
| 1985-05-20 | 74.2  |
| 1985-05-21 | 74.5  |
| 1985-05-22 | 75.1  |
| 1985-05-23 | 75.0  |
| 1985-05-24 | 79.6  |
| 1985-05-25 | 80.2  |
| 1985-05-26 | 79.9  |
| 1985-05-27 | 81.6  |
| 1985-05-28 | 79.9  |
| 1985-05-29 | 86.8  |
| 1985-05-30 | 82.7  |
| 1985-05-31 | 85.6  |
| 1985-06-01 | 92.8  |
| 1985-06-02 | 87.7  |
| 1985-06-03 | 88.1  |
| 1985-06-04 | 86.9  |
| 1985-06-05 | 80.5  |
| 1985-06-06 | 76.7  |
| 1985-06-07 | 74.5  |
| 1985-06-08 | 75.2  |
| 1985-06-09 | 74.1  |
| 1985-06-10 | 72.7  |
| 1985-06-11 | 69.1  |
| 1985-06-12 | 69.6  |
| 1985-06-13 | 68.9  |
| 1985-06-14 | 68.6  |
| 1985-06-15 | 67.8  |
| 1985-06-16 | 65.4  |
| 1985-06-17 | 66.4  |
| 1985-06-18 | 66.1  |
| 1985-06-19 | 65.2  |
| 1985-06-20 | 64.6  |
| 1985-06-21 | 62.7  |
| 1985-06-22 | 63.0  |
| 1985-06-23 | 62.2  |
| 1985-06-24 | 60.8  |
| 1985-06-25 | 60.4  |
| 1985-06-26 | 60.1  |
| 1985-06-27 | 58.0  |
| 1985-06-28 | 54.0  |
| 1985-06-29 | 55.0  |
| 1985-06-30 | 53.3  |
| 1985-07-01 | 54.9  |
| 1985-07-02 | 54.7  |
| 1985-07-03 | 54.0  |
| 1985-07-04 | 52.1  |
| 1985-07-05 | 53.8  |
| 1985-07-06 | 53.6  |
| 1985-07-07 | 54.0  |
| 1985-07-08 | 54.0  |
| 1985-07-09 | 54.4  |
| 1985-07-10 | 56.2  |
| 1985-07-11 | 60.3  |
| 1985-07-12 | 60.2  |
| 1985-07-13 | 58.8  |
| 1985-07-14 | 59.1  |
| 1985-07-15 | 58.7  |
| 1985-07-16 | 57.8  |
| 1985-07-17 | 57.0  |
| 1985-07-18 | 58.5  |
| 1985-07-19 | 58.4  |
| 1985-07-20 | 57.3  |
| 1985-07-21 | 57.6  |
| 1985-07-22 | 58.4  |
| 1985-07-23 | 58.0  |
| 1985-07-24 | 57.8  |
| 1985-07-25 | 58.0  |
| 1985-07-26 | 58.0  |
| 1985-07-27 | 58.0  |
| 1985-07-28 | 58.3  |
| 1985-07-29 | 58.9  |
| 1985-07-30 | 60.1  |
| 1985-07-31 | 63.2  |
| 1985-08-01 | 62.4  |
| 1985-08-02 | 62.0  |
| 1985-08-03 | 61.8  |
| 1985-08-04 | 59.9  |
| 1985-08-05 | 60.0  |
| 1985-08-06 | 60.0  |
| 1985-08-07 | 60.0  |
| 1985-08-08 | 60.0  |
| 1985-08-09 | 60.0  |
| 1985-08-10 | 60.0  |
| 1985-08-11 | 60.0  |
| 1985-08-12 | 60.0  |
| 1985-08-13 | 60.0  |
| 1985-08-14 | 60.0  |
| 1985-08-15 | 60.0  |
| 1985-08-16 | 60.0  |
| 1985-08-17 | 60.0  |
| 1985-08-18 | 60.0  |
| 1985-08-19 | 60.0  |
| 1985-08-20 | 60.0  |
| 1985-08-21 | 60.0  |
| 1985-08-22 | 60.0  |
| 1985-08-23 | 60.0  |
| 1985-08-24 | 60.0  |
| 1985-08-25 | 60.0  |
| 1985-08-26 | 60.0  |
| 1985-08-27 | 60.0  |
| 1985-08-28 | 60.0  |
| 1985-08-29 | 60.0  |
| 1985-08-30 | 60.0  |
| 1985-08-31 | 60.0  |
| 1985-09-01 | 60.0  |
| 1985-09-02 | 60.0  |
| 1985-09-03 | 60.0  |
| 1985-09-04 | 60.0  |
| 1985-09-05 | 60.0  |
| 1985-09-06 | 60.0  |
| 1985-09-07 | 62.0  |
| 1985-09-08 | 68.0  |
| 1985-09-09 | 72.0  |
| 1985-09-10 | 75.0  |
| 1985-09-11 | 75.0  |
| 1985-09-12 | 72.0  |
| 1985-09-13 | 70.0  |
| 1985-09-14 | 68.0  |
| 1985-09-15 | 66.0  |
| 1985-09-16 | 65.0  |
| 1985-09-17 | 64.0  |
| 1985-09-18 | 63.0  |
| 1985-09-19 | 62.0  |
| 1985-09-20 | 62.0  |
| 1985-09-21 | 62.0  |
| 1985-09-22 | 62.0  |
| 1985-09-23 | 62.0  |
| 1985-09-24 | 62.0  |
| 1985-09-25 | 62.0  |
| 1985-09-26 | 62.0  |
| 1985-09-27 | 62.0  |
| 1985-09-28 | 62.0  |
| 1985-09-29 | 62.0  |
| 1985-09-30 | 62.0  |
| 1985-10-01 | 62.0  |
| 1985-10-02 | 62.0  |
| 1985-10-03 | 62.0  |
| 1985-10-04 | 62.0  |
| 1985-10-05 | 62.0  |
| 1985-10-06 | 62.0  |
| 1985-10-07 | 59.0  |
| 1985-10-08 | 58.6  |
| 1985-10-09 | 58.7  |
| 1985-10-10 | 62.0  |
| 1985-10-11 | 62.0  |
| 1985-10-12 | 62.0  |
| 1985-10-13 | 62.0  |
| 1985-10-14 | 62.0  |
| 1985-10-15 | 62.0  |
| 1985-10-16 | 62.0  |
| 1985-10-17 | 62.0  |
| 1985-10-18 | 62.0  |
| 1985-10-19 | 62.0  |
| 1985-10-20 | 64.0  |
| 1985-10-21 | 65.0  |
| 1985-10-22 | 67.0  |
| 1985-10-23 | 68.0  |
| 1985-10-24 | 68.0  |
| 1985-10-25 | 67.0  |
| 1985-10-26 | 66.0  |
| 1985-10-27 | 64.0  |
| 1985-10-28 | 63.0  |
| 1985-10-29 | 62.0  |
| 1985-10-30 | 61.0  |
| 1985-10-31 | 60.0  |
| 1985-11-01 | 60.0  |
| 1985-11-02 | 60.0  |
| 1985-11-03 | 60.0  |
| 1985-11-04 | 60.0  |
| 1985-11-05 | 60.0  |
| 1985-11-06 | 60.0  |
| 1985-11-07 | 60.0  |
| 1985-11-08 | 60.0  |
| 1985-11-09 | 60.0  |
| 1985-11-10 | 60.0  |
| 1985-11-11 | 60.0  |
| 1985-11-12 | 60.0  |
| 1985-11-13 | 61.0  |
| 1985-11-14 | 63.0  |
| 1985-11-15 | 65.0  |
| 1985-11-16 | 66.0  |
| 1985-11-17 | 66.0  |
| 1985-11-18 | 65.0  |
| 1985-11-19 | 63.0  |
| 1985-11-20 | 62.0  |
| 1985-11-21 | 60.0  |
| 1985-11-22 | 60.0  |
| 1985-11-23 | 60.0  |
| 1985-11-24 | 60.0  |
| 1985-11-25 | 60.0  |
| 1985-11-26 | 60.0  |
| 1985-11-27 | 60.0  |
| 1985-11-28 | 60.0  |
| 1985-11-29 | 60.0  |
| 1985-11-30 | 60.0  |
| 1985-12-01 | 60.0  |
| 1985-12-02 | 60.0  |
| 1985-12-03 | 60.0  |
| 1985-12-04 | 60.0  |
| 1985-12-05 | 62.0  |
| 1985-12-06 | 65.0  |
| 1985-12-07 | 68.0  |
| 1985-12-08 | 68.0  |
| 1985-12-09 | 68.0  |
| 1985-12-10 | 66.0  |
| 1985-12-11 | 65.0  |
| 1985-12-12 | 64.0  |
| 1985-12-13 | 64.0  |
| 1985-12-14 | 64.0  |
| 1985-12-15 | 64.0  |
| 1985-12-16 | 64.0  |
| 1985-12-17 | 63.0  |
| 1985-12-18 | 62.0  |
| 1985-12-19 | 61.0  |
| 1985-12-20 | 60.0  |
| 1985-12-21 | 60.0  |
| 1985-12-22 | 60.0  |
| 1985-12-23 | 60.0  |
| 1985-12-24 | 58.1  |
| 1985-12-25 | 58.2  |
| 1985-12-26 | 57.8  |
| 1985-12-27 | 57.4  |
| 1985-12-28 | 57.4  |
| 1985-12-29 | 57.5  |
| 1985-12-30 | 57.5  |
| 1985-12-31 | 58.0  |
| 1986-01-01 | 59.2  |
| 1986-01-02 | 59.6  |
| 1986-01-03 | 59.8  |
| 1986-01-04 | 58.8  |
| 1986-01-05 | 60.8  |
| 1986-01-06 | 63.7  |
| 1986-01-07 | 61.7  |
| 1986-01-08 | 61.3  |
| 1986-01-09 | 63.1  |
| 1986-01-10 | 63.3  |
| 1986-01-11 | 62.1  |
| 1986-01-12 | 61.1  |
| 1986-01-13 | 60.9  |
| 1986-01-14 | 61.4  |
| 1986-01-15 | 61.8  |
| 1986-01-16 | 66.9  |
| 1986-01-17 | 76.2  |
| 1986-01-18 | 78.6  |
| 1986-01-19 | 78.7  |
| 1986-01-20 | 74.9  |
| 1986-01-21 | 71.1  |
| 1986-01-22 | 68.4  |
| 1986-01-23 | 67.0  |
| 1986-01-24 | 65.0  |
| 1986-01-25 | 65.1  |
| 1986-01-26 | 64.9  |
| 1986-01-27 | 64.9  |
| 1986-01-28 | 67.5  |
| 1986-01-29 | 71.2  |
| 1986-01-30 | 71.9  |
| 1986-01-31 | 71.0  |
| 1986-02-01 | 70.6  |
| 1986-02-02 | 70.5  |
| 1986-02-03 | 70.3  |
| 1986-02-04 | 69.3  |
| 1986-02-05 | 68.4  |
| 1986-02-06 | 67.4  |
| 1986-02-07 | 66.6  |
| 1986-02-08 | 65.1  |
| 1986-02-09 | 64.7  |
| 1986-02-10 | 65.4  |
| 1986-02-11 | 65.4  |
| 1986-02-12 | 65.9  |
| 1986-02-13 | 68.5  |
| 1986-02-14 | 71.6  |
| 1986-02-15 | 78.6  |
| 1986-02-16 | 80.0  |
| 1986-02-17 | 85.6  |
| 1986-02-18 | 98.5  |
| 1986-02-19 | 110.0 |
| 1986-02-20 | 109.0 |
| 1986-02-21 | 109.0 |
| 1986-02-22 | 112.0 |
| 1986-02-23 | 115.0 |
| 1986-02-24 | 112.0 |
| 1986-02-25 | 112.0 |
| 1986-02-26 | 111.0 |
| 1986-02-27 | 111.0 |
| 1986-02-28 | 111.0 |
| 1986-03-01 | 110.0 |
| 1986-03-02 | 110.0 |
| 1986-03-03 | 110.0 |
| 1986-03-04 | 110.0 |
| 1986-03-05 | 112.0 |
| 1986-03-06 | 115.0 |
| 1986-03-07 | 129.0 |
| 1986-03-08 | 163.0 |
| 1986-03-09 | 173.0 |
| 1986-03-10 | 170.0 |
| 1986-03-11 | 168.0 |
| 1986-03-12 | 165.0 |
| 1986-03-13 | 162.0 |
| 1986-03-14 | 158.0 |
| 1986-03-15 | 154.0 |
| 1986-03-16 | 152.0 |
| 1986-03-17 | 148.0 |
| 1986-03-18 | 144.0 |
| 1986-03-19 | 141.0 |
| 1986-03-20 | 139.0 |
| 1986-03-21 | 138.0 |
| 1986-03-22 | 137.0 |
| 1986-03-23 | 138.0 |
| 1986-03-24 | 144.0 |
| 1986-03-25 | 144.0 |
| 1986-03-26 | 143.0 |
| 1986-03-27 | 144.0 |
| 1986-03-28 | 147.0 |
| 1986-03-29 | 149.0 |
| 1986-03-30 | 152.0 |
| 1986-03-31 | 153.0 |
| 1986-04-01 | 152.0 |
| 1986-04-02 | 149.0 |
| 1986-04-03 | 145.0 |
| 1986-04-04 | 145.0 |
| 1986-04-05 | 144.0 |
| 1986-04-06 | 143.0 |
| 1986-04-07 | 143.0 |
| 1986-04-08 | 143.0 |
| 1986-04-09 | 143.0 |
| 1986-04-10 | 143.0 |
| 1986-04-11 | 142.0 |
| 1986-04-12 | 141.0 |
| 1986-04-13 | 140.0 |
| 1986-04-14 | 137.0 |
| 1986-04-15 | 135.0 |
| 1986-04-16 | 133.0 |
| 1986-04-17 | 133.0 |
| 1986-04-18 | 128.0 |
| 1986-04-19 | 122.0 |
| 1986-04-20 | 118.0 |
| 1986-04-21 | 116.0 |
| 1986-04-22 | 118.0 |
| 1986-04-23 | 121.0 |
| 1986-04-24 | 119.0 |
| 1986-04-25 | 121.0 |
| 1986-04-26 | 121.0 |
| 1986-04-27 | 117.0 |
| 1986-04-28 | 115.0 |
| 1986-04-29 | 111.0 |
| 1986-04-30 | 105.0 |
| 1986-05-01 | 101.0 |
| 1986-05-02 | 99.3  |
| 1986-05-03 | 110.0 |
| 1986-05-04 | 116.0 |
| 1986-05-05 | 111.0 |
| 1986-05-06 | 113.0 |
| 1986-05-07 | 108.0 |
| 1986-05-08 | 104.0 |
| 1986-05-09 | 101.0 |
| 1986-05-10 | 104.0 |
| 1986-05-11 | 101.0 |
| 1986-05-12 | 98.0  |
| 1986-05-13 | 96.1  |
| 1986-05-14 | 92.3  |
| 1986-05-15 | 87.2  |
| 1986-05-16 | 84.2  |
| 1986-05-17 | 80.3  |
| 1986-05-18 | 78.7  |
| 1986-05-19 | 78.8  |
| 1986-05-20 | 79.7  |
| 1986-05-21 | 83.9  |
| 1986-05-22 | 86.5  |
| 1986-05-23 | 84.3  |
| 1986-05-24 | 82.3  |
| 1986-05-25 | 79.3  |
| 1986-05-26 | 74.0  |
| 1986-05-27 | 75.2  |
| 1986-05-28 | 77.6  |
| 1986-05-29 | 79.3  |
| 1986-05-30 | 82.6  |
| 1986-05-31 | 86.6  |
| 1986-06-01 | 87.6  |
| 1986-06-02 | 86.1  |
| 1986-06-03 | 86.3  |
| 1986-06-04 | 90.0  |
| 1986-06-05 | 98.0  |
| 1986-06-06 | 99.8  |
| 1986-06-07 | 97.6  |
| 1986-06-08 | 91.1  |
| 1986-06-09 | 86.1  |
| 1986-06-10 | 83.6  |
| 1986-06-11 | 82.3  |
| 1986-06-12 | 83.6  |
| 1986-06-13 | 82.9  |
| 1986-06-14 | 80.5  |
| 1986-06-15 | 79.3  |
| 1986-06-16 | 77.6  |
| 1986-06-17 | 75.6  |
| 1986-06-18 | 74.0  |
| 1986-06-19 | 73.5  |
| 1986-06-20 | 72.7  |
| 1986-06-21 | 72.3  |
| 1986-06-22 | 71.8  |
| 1986-06-23 | 71.0  |
| 1986-06-24 | 70.6  |
| 1986-06-25 | 70.1  |
| 1986-06-26 | 66.5  |
| 1986-06-27 | 65.0  |
| 1986-06-28 | 65.9  |
| 1986-06-29 | 66.4  |
| 1986-06-30 | 65.9  |
| 1986-07-01 | 63.8  |
| 1986-07-02 | 64.4  |
| 1986-07-03 | 65.9  |
| 1986-07-04 | 66.8  |
| 1986-07-05 | 67.3  |
| 1986-07-06 | 67.0  |
| 1986-07-07 | 66.9  |
| 1986-07-08 | 65.2  |
| 1986-07-09 | 64.6  |
| 1986-07-10 | 64.3  |
| 1986-07-11 | 64.9  |
| 1986-07-12 | 63.4  |
| 1986-07-13 | 62.8  |
| 1986-07-14 | 64.2  |
| 1986-07-15 | 65.2  |
| 1986-07-16 | 63.6  |
| 1986-07-17 | 64.1  |
| 1986-07-18 | 64.5  |
| 1986-07-19 | 64.5  |
| 1986-07-20 | 64.7  |
| 1986-07-21 | 64.2  |
| 1986-07-22 | 63.5  |
| 1986-07-23 | 62.9  |
| 1986-07-24 | 60.6  |
| 1986-07-25 | 58.8  |
| 1986-07-26 | 58.0  |
| 1986-07-27 | 57.6  |
| 1986-07-28 | 58.3  |
| 1986-07-29 | 60.3  |
| 1986-07-30 | 61.6  |
| 1986-07-31 | 61.7  |
| 1986-08-01 | 61.7  |
| 1986-08-02 | 61.1  |
| 1986-08-03 | 60.1  |
| 1986-08-04 | 60.8  |
| 1986-08-05 | 60.4  |
| 1986-08-06 | 60.2  |
| 1986-08-07 | 59.9  |
| 1986-08-08 | 58.2  |
| 1986-08-09 | 59.2  |
| 1986-08-10 | 60.0  |
| 1986-08-11 | 59.6  |
| 1986-08-12 | 59.5  |
| 1986-08-13 | 58.3  |
| 1986-08-14 | 58.2  |
| 1986-08-15 | 59.3  |
| 1986-08-16 | 59.2  |
| 1986-08-17 | 59.2  |
| 1986-08-18 | 59.2  |
| 1986-08-19 | 59.3  |
| 1986-08-20 | 58.4  |
| 1986-08-21 | 57.4  |
| 1986-08-22 | 58.4  |
| 1986-08-23 | 59.5  |
| 1986-08-24 | 58.8  |
| 1986-08-25 | 58.7  |
| 1986-08-26 | 58.7  |
| 1986-08-27 | 59.3  |
| 1986-08-28 | 59.6  |
| 1986-08-29 | 60.1  |
| 1986-08-30 | 61.6  |
| 1986-08-31 | 62.5  |
| 1986-09-01 | 62.6  |
| 1986-09-02 | 62.0  |
| 1986-09-03 | 59.6  |
| 1986-09-04 | 61.0  |
| 1986-09-05 | 61.3  |
| 1986-09-06 | 61.0  |
| 1986-09-07 | 60.7  |
| 1986-09-08 | 60.6  |
| 1986-09-09 | 60.2  |
| 1986-09-10 | 60.0  |
| 1986-09-11 | 60.1  |
| 1986-09-12 | 59.9  |
| 1986-09-13 | 59.8  |
| 1986-09-14 | 59.3  |
| 1986-09-15 | 60.1  |
| 1986-09-16 | 60.7  |
| 1986-09-17 | 62.3  |
| 1986-09-18 | 62.1  |
| 1986-09-19 | 62.8  |
| 1986-09-20 | 68.2  |
| 1986-09-21 | 68.3  |
| 1986-09-22 | 67.4  |
| 1986-09-23 | 67.8  |
| 1986-09-24 | 70.5  |
| 1986-09-25 | 71.6  |
| 1986-09-26 | 73.0  |
| 1986-09-27 | 72.3  |
| 1986-09-28 | 71.3  |
| 1986-09-29 | 71.1  |
| 1986-09-30 | 71.6  |
| 1986-10-01 | 70.6  |
| 1986-10-02 | 69.8  |
| 1986-10-03 | 69.2  |
| 1986-10-04 | 68.6  |
| 1986-10-05 | 68.3  |
| 1986-10-06 | 68.1  |
| 1986-10-07 | 67.7  |
| 1986-10-08 | 67.1  |
| 1986-10-09 | 66.9  |
| 1986-10-10 | 66.6  |
| 1986-10-11 | 66.2  |
| 1986-10-12 | 65.9  |
| 1986-10-13 | 65.8  |
| 1986-10-14 | 65.7  |
| 1986-10-15 | 65.5  |
| 1986-10-16 | 65.3  |
| 1986-10-17 | 65.8  |
| 1986-10-18 | 66.1  |
| 1986-10-19 | 65.6  |
| 1986-10-20 | 65.3  |
| 1986-10-21 | 65.3  |
| 1986-10-22 | 65.2  |
| 1986-10-23 | 65.1  |
| 1986-10-24 | 65.4  |
| 1986-10-25 | 65.5  |
| 1986-10-26 | 65.3  |
| 1986-10-27 | 67.3  |
| 1986-10-28 | 66.3  |
| 1986-10-29 | 65.9  |
| 1986-10-30 | 68.3  |
| 1986-10-31 | 66.8  |
| 1986-11-01 | 65.6  |
| 1986-11-02 | 66.0  |
| 1986-11-03 | 66.0  |
| 1986-11-04 | 65.6  |
| 1986-11-05 | 65.6  |
| 1986-11-06 | 65.4  |
| 1986-11-07 | 66.0  |
| 1986-11-08 | 66.1  |
| 1986-11-09 | 66.3  |
| 1986-11-10 | 66.1  |
| 1986-11-11 | 65.4  |
| 1986-11-12 | 65.4  |
| 1986-11-13 | 65.4  |
| 1986-11-14 | 65.6  |
| 1986-11-15 | 66.0  |
| 1986-11-16 | 65.4  |
| 1986-11-17 | 65.5  |
| 1986-11-18 | 65.3  |
| 1986-11-19 | 65.0  |
| 1986-11-20 | 65.3  |
| 1986-11-21 | 66.0  |
| 1986-11-22 | 65.9  |
| 1986-11-23 | 66.0  |
| 1986-11-24 | 65.4  |
| 1986-11-25 | 65.4  |
| 1986-11-26 | 65.4  |
| 1986-11-27 | 65.9  |
| 1986-11-28 | 65.8  |
| 1986-11-29 | 66.3  |
| 1986-11-30 | 64.7  |
| 1986-12-01 | 65.3  |
| 1986-12-02 | 65.5  |
| 1986-12-03 | 65.6  |
| 1986-12-04 | 66.0  |
| 1986-12-05 | 68.2  |
| 1986-12-06 | 68.0  |
| 1986-12-07 | 67.0  |
| 1986-12-08 | 65.6  |
| 1986-12-09 | 65.6  |
| 1986-12-10 | 64.7  |
| 1986-12-11 | 65.1  |
| 1986-12-12 | 66.0  |
| 1986-12-13 | 66.0  |
| 1986-12-14 | 65.7  |
| 1986-12-15 | 64.5  |
| 1986-12-16 | 64.7  |
| 1986-12-17 | 64.1  |
| 1986-12-18 | 64.6  |
| 1986-12-19 | 65.2  |
| 1986-12-20 | 65.6  |
| 1986-12-21 | 65.1  |
| 1986-12-22 | 65.8  |
| 1986-12-23 | 65.3  |
| 1986-12-24 | 65.1  |
| 1986-12-25 | 64.4  |
| 1986-12-26 | 65.0  |
| 1986-12-27 | 64.9  |
| 1986-12-28 | 63.7  |
| 1986-12-29 | 64.5  |
| 1986-12-30 | 63.7  |
| 1986-12-31 | 64.4  |
| 1987-01-01 | 66.3  |
| 1987-01-02 | 65.3  |
| 1987-01-03 | 65.5  |
| 1987-01-04 | 64.9  |
| 1987-01-05 | 64.7  |
| 1987-01-06 | 64.0  |
| 1987-01-07 | 63.0  |
| 1987-01-08 | 60.0  |
| 1987-01-09 | 60.0  |
| 1987-01-10 | 64.0  |
| 1987-01-11 | 64.0  |
| 1987-01-12 | 64.0  |
| 1987-01-13 | 64.0  |
| 1987-01-14 | 64.0  |
| 1987-01-15 | 60.0  |
| 1987-01-16 | 58.0  |
| 1987-01-17 | 58.0  |
| 1987-01-18 | 58.0  |
| 1987-01-19 | 60.0  |
| 1987-01-20 | 62.0  |
| 1987-01-21 | 62.0  |
| 1987-01-22 | 62.0  |
| 1987-01-23 | 62.0  |
| 1987-01-24 | 63.7  |
| 1987-01-25 | 64.6  |
| 1987-01-26 | 67.2  |
| 1987-01-27 | 70.1  |
| 1987-01-28 | 71.9  |
| 1987-01-29 | 69.4  |
| 1987-01-30 | 68.9  |
| 1987-01-31 | 67.9  |
| 1987-02-01 | 67.5  |
| 1987-02-02 | 67.6  |
| 1987-02-03 | 66.7  |
| 1987-02-04 | 66.1  |
| 1987-02-05 | 65.7  |
| 1987-02-06 | 65.5  |
| 1987-02-07 | 65.5  |
| 1987-02-08 | 65.5  |
| 1987-02-09 | 65.4  |
| 1987-02-10 | 67.1  |
| 1987-02-11 | 71.3  |
| 1987-02-12 | 70.9  |
| 1987-02-13 | 74.1  |
| 1987-02-14 | 71.6  |
| 1987-02-15 | 69.7  |
| 1987-02-16 | 69.3  |
| 1987-02-17 | 69.3  |
| 1987-02-18 | 69.1  |
| 1987-02-19 | 68.2  |
| 1987-02-20 | 68.0  |
| 1987-02-21 | 67.8  |
| 1987-02-22 | 66.8  |
| 1987-02-23 | 66.8  |
| 1987-02-24 | 66.6  |
| 1987-02-25 | 66.0  |
| 1987-02-26 | 65.7  |
| 1987-02-27 | 66.3  |
| 1987-02-28 | 65.7  |
| 1987-03-01 | 65.6  |
| 1987-03-02 | 65.6  |
| 1987-03-03 | 66.5  |
| 1987-03-04 | 66.9  |
| 1987-03-05 | 66.5  |
| 1987-03-06 | 66.7  |
| 1987-03-07 | 65.9  |
| 1987-03-08 | 65.8  |
| 1987-03-09 | 65.6  |
| 1987-03-10 | 65.6  |
| 1987-03-11 | 66.0  |
| 1987-03-12 | 68.3  |
| 1987-03-13 | 69.9  |
| 1987-03-14 | 69.5  |
| 1987-03-15 | 69.9  |
| 1987-03-16 | 70.0  |
| 1987-03-17 | 69.7  |
| 1987-03-18 | 69.7  |
| 1987-03-19 | 68.9  |
| 1987-03-20 | 68.3  |
| 1987-03-21 | 68.5  |
| 1987-03-22 | 67.7  |
| 1987-03-23 | 68.2  |
| 1987-03-24 | 67.5  |
| 1987-03-25 | 67.3  |
| 1987-03-26 | 66.9  |
| 1987-03-27 | 66.2  |
| 1987-03-28 | 66.1  |
| 1987-03-29 | 66.0  |
| 1987-03-30 | 65.9  |
| 1987-03-31 | 66.0  |
| 1987-04-01 | 66.2  |
| 1987-04-02 | 66.4  |
| 1987-04-03 | 66.3  |
| 1987-04-04 | 66.1  |
| 1987-04-05 | 65.9  |
| 1987-04-06 | 65.9  |
| 1987-04-07 | 66.1  |
| 1987-04-08 | 66.4  |
| 1987-04-09 | 67.2  |
| 1987-04-10 | 67.9  |
| 1987-04-11 | 67.8  |
| 1987-04-12 | 64.6  |
| 1987-04-13 | 64.2  |
| 1987-04-14 | 63.8  |
| 1987-04-15 | 60.5  |
| 1987-04-16 | 54.9  |
| 1987-04-17 | 53.9  |
| 1987-04-18 | 53.0  |
| 1987-04-19 | 54.2  |
| 1987-04-20 | 54.6  |
| 1987-04-21 | 54.2  |
| 1987-04-22 | 53.6  |
| 1987-04-23 | 52.5  |
| 1987-04-24 | 52.1  |
| 1987-04-25 | 52.0  |
| 1987-04-26 | 52.3  |
| 1987-04-27 | 51.7  |
| 1987-04-28 | 51.1  |
| 1987-04-29 | 52.2  |
| 1987-04-30 | 53.4  |
| 1987-05-01 | 59.6  |
| 1987-05-02 | 60.7  |
| 1987-05-03 | 58.1  |
| 1987-05-04 | 57.8  |
| 1987-05-05 | 57.5  |
| 1987-05-06 | 56.4  |
| 1987-05-07 | 57.0  |
| 1987-05-08 | 57.4  |
| 1987-05-09 | 58.9  |
| 1987-05-10 | 58.6  |
| 1987-05-11 | 57.0  |
| 1987-05-12 | 55.4  |
| 1987-05-13 | 56.2  |
| 1987-05-14 | 55.9  |
| 1987-05-15 | 54.8  |
| 1987-05-16 | 55.4  |
| 1987-05-17 | 54.8  |
| 1987-05-18 | 54.5  |
| 1987-05-19 | 54.0  |
| 1987-05-20 | 53.9  |
| 1987-05-21 | 53.9  |
| 1987-05-22 | 53.8  |
| 1987-05-23 | 53.6  |
| 1987-05-24 | 53.6  |
| 1987-05-25 | 57.6  |
| 1987-05-26 | 58.6  |
| 1987-05-27 | 57.0  |
| 1987-05-28 | 55.9  |
| 1987-05-29 | 56.7  |
| 1987-05-30 | 56.6  |
| 1987-05-31 | 57.5  |
| 1987-06-01 | 57.4  |
| 1987-06-02 | 57.0  |
| 1987-06-03 | 56.2  |
| 1987-06-04 | 54.6  |
| 1987-06-05 | 58.5  |
| 1987-06-06 | 58.5  |
| 1987-06-07 | 58.1  |
| 1987-06-08 | 59.9  |
| 1987-06-09 | 58.9  |
| 1987-06-10 | 57.0  |
| 1987-06-11 | 57.9  |
| 1987-06-12 | 59.0  |
| 1987-06-13 | 57.3  |
| 1987-06-14 | 56.1  |
| 1987-06-15 | 58.4  |
| 1987-06-16 | 57.9  |
| 1987-06-17 | 58.7  |
| 1987-06-18 | 58.9  |
| 1987-06-19 | 57.7  |
| 1987-06-20 | 57.0  |
| 1987-06-21 | 56.4  |
| 1987-06-22 | 55.7  |
| 1987-06-23 | 55.3  |
| 1987-06-24 | 54.4  |
| 1987-06-25 | 52.8  |
| 1987-06-26 | 52.8  |
| 1987-06-27 | 54.4  |
| 1987-06-28 | 53.4  |
| 1987-06-29 | 50.8  |
| 1987-06-30 | 50.6  |
| 1987-07-01 | 51.4  |
| 1987-07-02 | 54.3  |
| 1987-07-03 | 51.7  |
| 1987-07-04 | 51.8  |
| 1987-07-05 | 50.6  |
| 1987-07-06 | 50.2  |
| 1987-07-07 | 50.1  |
| 1987-07-08 | 49.8  |
| 1987-07-09 | 48.8  |
| 1987-07-10 | 48.7  |
| 1987-07-11 | 48.4  |
| 1987-07-12 | 50.8  |
| 1987-07-13 | 51.6  |
| 1987-07-14 | 51.2  |
| 1987-07-15 | 50.5  |
| 1987-07-16 | 50.2  |
| 1987-07-17 | 53.9  |
| 1987-07-18 | 60.6  |
| 1987-07-19 | 60.9  |
| 1987-07-20 | 57.0  |
| 1987-07-21 | 55.3  |
| 1987-07-22 | 64.2  |
| 1987-07-23 | 63.7  |
| 1987-07-24 | 60.0  |
| 1987-07-25 | 57.8  |
| 1987-07-26 | 56.2  |
| 1987-07-27 | 53.8  |
| 1987-07-28 | 52.7  |
| 1987-07-29 | 53.5  |
| 1987-07-30 | 52.9  |
| 1987-07-31 | 52.7  |
| 1987-08-01 | 52.1  |
| 1987-08-02 | 51.6  |
| 1987-08-03 | 51.1  |
| 1987-08-04 | 49.9  |
| 1987-08-05 | 49.9  |
| 1987-08-06 | 50.6  |
| 1987-08-07 | 50.6  |
| 1987-08-08 | 50.5  |
| 1987-08-09 | 50.5  |
| 1987-08-10 | 50.4  |
| 1987-08-11 | 50.1  |
| 1987-08-12 | 50.8  |
| 1987-08-13 | 51.0  |
| 1987-08-14 | 50.7  |
| 1987-08-15 | 50.8  |
| 1987-08-16 | 50.2  |
| 1987-08-17 | 49.9  |
| 1987-08-18 | 49.6  |
| 1987-08-19 | 49.1  |
| 1987-08-20 | 48.6  |
| 1987-08-21 | 47.7  |
| 1987-08-22 | 46.9  |
| 1987-08-23 | 47.5  |
| 1987-08-24 | 48.0  |
| 1987-08-25 | 47.2  |
| 1987-08-26 | 46.4  |
| 1987-08-27 | 47.3  |
| 1987-08-28 | 47.2  |
| 1987-08-29 | 47.1  |
| 1987-08-30 | 47.1  |
| 1987-08-31 | 47.1  |
| 1987-09-01 | 46.7  |
| 1987-09-02 | 46.5  |
| 1987-09-03 | 46.7  |
| 1987-09-04 | 45.9  |
| 1987-09-05 | 47.0  |
| 1987-09-06 | 47.1  |
| 1987-09-07 | 47.3  |
| 1987-09-08 | 46.9  |
| 1987-09-09 | 47.1  |
| 1987-09-10 | 47.1  |
| 1987-09-11 | 47.0  |
| 1987-09-12 | 46.8  |
| 1987-09-13 | 47.5  |
| 1987-09-14 | 46.5  |
| 1987-09-15 | 47.1  |
| 1987-09-16 | 47.7  |
| 1987-09-17 | 48.7  |
| 1987-09-18 | 48.6  |
| 1987-09-19 | 49.3  |
| 1987-09-20 | 49.9  |
| 1987-09-21 | 48.8  |
| 1987-09-22 | 48.5  |
| 1987-09-23 | 49.8  |
| 1987-09-24 | 49.4  |
| 1987-09-25 | 49.6  |
| 1987-09-26 | 50.0  |
| 1987-09-27 | 50.2  |
| 1987-09-28 | 50.6  |
| 1987-09-29 | 50.6  |
| 1987-09-30 | 50.7  |
| 1987-10-01 | 53.0  |
| 1987-10-02 | 53.0  |
| 1987-10-03 | 53.0  |
| 1987-10-04 | 56.0  |
| 1987-10-05 | 59.0  |
| 1987-10-06 | 58.0  |
| 1987-10-07 | 57.0  |
| 1987-10-08 | 55.0  |
| 1987-10-09 | 55.0  |
| 1987-10-10 | 54.0  |
| 1987-10-11 | 54.0  |
| 1987-10-12 | 54.0  |
| 1987-10-13 | 54.0  |
| 1987-10-14 | 54.0  |
| 1987-10-15 | 55.0  |
| 1987-10-16 | 55.0  |
| 1987-10-17 | 55.0  |
| 1987-10-18 | 55.0  |
| 1987-10-19 | 54.0  |
| 1987-10-20 | 54.0  |
| 1987-10-21 | 53.0  |
| 1987-10-22 | 54.0  |
| 1987-10-23 | 53.0  |
| 1987-10-24 | 54.0  |
| 1987-10-25 | 54.0  |
| 1987-10-26 | 54.0  |
| 1987-10-27 | 54.0  |
| 1987-10-28 | 55.0  |
| 1987-10-29 | 56.0  |
| 1987-10-30 | 57.0  |
| 1987-10-31 | 57.0  |
| 1987-11-01 | 56.0  |
| 1987-11-02 | 57.0  |
| 1987-11-03 | 61.0  |
| 1987-11-04 | 72.0  |
| 1987-11-05 | 75.0  |
| 1987-11-06 | 69.0  |
| 1987-11-07 | 64.0  |
| 1987-11-08 | 61.0  |
| 1987-11-09 | 61.0  |
| 1987-11-10 | 61.0  |
| 1987-11-11 | 61.0  |
| 1987-11-12 | 62.0  |
| 1987-11-13 | 63.0  |
| 1987-11-14 | 62.0  |
| 1987-11-15 | 62.0  |
| 1987-11-16 | 62.0  |
| 1987-11-17 | 63.0  |
| 1987-11-18 | 64.0  |
| 1987-11-19 | 63.0  |
| 1987-11-20 | 62.0  |
| 1987-11-21 | 61.0  |
| 1987-11-22 | 60.0  |
| 1987-11-23 | 60.0  |
| 1987-11-24 | 61.0  |
| 1987-11-25 | 61.0  |
| 1987-11-26 | 60.0  |
| 1987-11-27 | 59.0  |
| 1987-11-28 | 59.0  |
| 1987-11-29 | 62.0  |
| 1987-11-30 | 59.0  |
| 1987-12-01 | 61.0  |
| 1987-12-02 | 70.0  |
| 1987-12-03 | 72.0  |
| 1987-12-04 | 70.0  |
| 1987-12-05 | 68.0  |
| 1987-12-06 | 66.0  |
| 1987-12-07 | 66.0  |
| 1987-12-08 | 65.0  |
| 1987-12-09 | 64.0  |
| 1987-12-10 | 61.0  |
| 1987-12-11 | 59.0  |
| 1987-12-12 | 56.0  |
| 1987-12-13 | 56.0  |
| 1987-12-14 | 55.0  |
| 1987-12-15 | 56.0  |
| 1987-12-16 | 56.0  |
| 1987-12-17 | 58.0  |
| 1987-12-18 | 61.0  |
| 1987-12-19 | 61.0  |
| 1987-12-20 | 64.0  |
| 1987-12-21 | 62.0  |
| 1987-12-22 | 60.0  |
| 1987-12-23 | 58.0  |
| 1987-12-24 | 56.0  |
| 1987-12-25 | 55.0  |
| 1987-12-26 | 55.0  |
| 1987-12-27 | 55.0  |
| 1987-12-28 | 55.0  |
| 1987-12-29 | 56.0  |
| 1987-12-30 | 56.0  |
| 1987-12-31 | 56.0  |
| 1988-01-01 | 56.0  |
| 1988-01-02 | 57.0  |
| 1988-01-03 | 58.0  |
| 1988-01-04 | 62.0  |
| 1988-01-05 | 61.0  |
| 1988-01-06 | 58.0  |
| 1988-01-07 | 58.0  |
| 1988-01-08 | 60.0  |
| 1988-01-09 | 66.0  |
| 1988-01-10 | 72.0  |
| 1988-01-11 | 74.0  |
| 1988-01-12 | 74.0  |
| 1988-01-13 | 73.0  |
| 1988-01-14 | 73.0  |
| 1988-01-15 | 72.0  |
| 1988-01-16 | 72.0  |
| 1988-01-17 | 72.0  |
| 1988-01-18 | 70.0  |
| 1988-01-19 | 66.0  |
| 1988-01-20 | 62.0  |
| 1988-01-21 | 58.0  |
| 1988-01-22 | 56.0  |
| 1988-01-23 | 56.0  |
| 1988-01-24 | 57.0  |
| 1988-01-25 | 59.0  |
| 1988-01-26 | 58.0  |
| 1988-01-27 | 58.0  |
| 1988-01-28 | 58.0  |
| 1988-01-29 | 59.0  |
| 1988-01-30 | 60.0  |
| 1988-01-31 | 66.0  |
| 1988-02-01 | 68.0  |
| 1988-02-02 | 65.0  |
| 1988-02-03 | 60.0  |
| 1988-02-04 | 59.0  |
| 1988-02-05 | 58.0  |
| 1988-02-06 | 57.0  |
| 1988-02-07 | 57.0  |
| 1988-02-08 | 57.0  |
| 1988-02-09 | 56.0  |
| 1988-02-10 | 56.0  |
| 1988-02-11 | 55.0  |
| 1988-02-12 | 55.0  |
| 1988-02-13 | 55.0  |
| 1988-02-14 | 54.0  |
| 1988-02-15 | 54.0  |
| 1988-02-16 | 54.0  |
| 1988-02-17 | 55.0  |
| 1988-02-18 | 55.0  |
| 1988-02-19 | 55.0  |
| 1988-02-20 | 54.0  |
| 1988-02-21 | 54.0  |
| 1988-02-22 | 54.0  |
| 1988-02-23 | 54.0  |
| 1988-02-24 | 54.0  |
| 1988-02-25 | 54.0  |
| 1988-02-26 | 54.0  |
| 1988-02-27 | 54.0  |
| 1988-02-28 | 54.0  |
| 1988-02-29 | 55.0  |
| 1988-03-01 | 55.0  |
| 1988-03-02 | 54.0  |
| 1988-03-03 | 55.0  |
| 1988-03-04 | 57.0  |
| 1988-03-05 | 60.0  |
| 1988-03-06 | 61.0  |
| 1988-03-07 | 61.0  |
| 1988-03-08 | 61.0  |
| 1988-03-09 | 62.0  |
| 1988-03-10 | 62.0  |
| 1988-03-11 | 62.0  |
| 1988-03-12 | 62.0  |
| 1988-03-13 | 62.0  |
| 1988-03-14 | 61.0  |
| 1988-03-15 | 60.0  |
| 1988-03-16 | 60.0  |
| 1988-03-17 | 59.0  |
| 1988-03-18 | 58.0  |
| 1988-03-19 | 58.0  |
| 1988-03-20 | 57.0  |
| 1988-03-21 | 56.0  |
| 1988-03-22 | 55.0  |
| 1988-03-23 | 54.0  |
| 1988-03-24 | 53.0  |
| 1988-03-25 | 52.0  |
| 1988-03-26 | 52.0  |
| 1988-03-27 | 52.0  |
| 1988-03-28 | 53.0  |
| 1988-03-29 | 53.0  |
| 1988-03-30 | 54.0  |
| 1988-03-31 | 54.0  |
| 1988-04-01 | 54.0  |
| 1988-04-02 | 54.0  |
| 1988-04-03 | 54.0  |
| 1988-04-04 | 54.0  |
| 1988-04-05 | 54.0  |
| 1988-04-06 | 54.0  |
| 1988-04-07 | 54.0  |
| 1988-04-08 | 54.0  |
| 1988-04-09 | 54.0  |
| 1988-04-10 | 52.0  |
| 1988-04-11 | 52.0  |
| 1988-04-12 | 52.0  |
| 1988-04-13 | 52.0  |
| 1988-04-14 | 54.0  |
| 1988-04-15 | 54.0  |
| 1988-04-16 | 53.0  |
| 1988-04-17 | 53.0  |
| 1988-04-18 | 53.0  |
| 1988-04-19 | 54.0  |
| 1988-04-20 | 57.0  |
| 1988-04-21 | 64.0  |
| 1988-04-22 | 66.0  |
| 1988-04-23 | 65.0  |
| 1988-04-24 | 63.0  |
| 1988-04-25 | 61.0  |
| 1988-04-26 | 61.0  |
| 1988-04-27 | 65.0  |
| 1988-04-28 | 66.0  |
| 1988-04-29 | 67.0  |
| 1988-04-30 | 66.0  |
| 1988-05-01 | 65.0  |
| 1988-05-02 | 64.0  |
| 1988-05-03 | 63.0  |
| 1988-05-04 | 62.0  |
| 1988-05-05 | 63.0  |
| 1988-05-06 | 62.0  |
| 1988-05-07 | 62.0  |
| 1988-05-08 | 63.0  |
| 1988-05-09 | 62.0  |
| 1988-05-10 | 61.0  |
| 1988-05-11 | 60.0  |
| 1988-05-12 | 60.0  |
| 1988-05-13 | 60.0  |
| 1988-05-14 | 57.0  |
| 1988-05-15 | 55.0  |
| 1988-05-16 | 55.0  |
| 1988-05-17 | 57.0  |
| 1988-05-18 | 55.0  |
| 1988-05-19 | 55.0  |
| 1988-05-20 | 54.0  |
| 1988-05-21 | 54.0  |
| 1988-05-22 | 54.0  |
| 1988-05-23 | 54.0  |
| 1988-05-24 | 54.0  |
| 1988-05-25 | 54.0  |
| 1988-05-26 | 54.0  |
| 1988-05-27 | 54.0  |
| 1988-05-28 | 57.0  |
| 1988-05-29 | 62.0  |
| 1988-05-30 | 58.0  |
| 1988-05-31 | 57.0  |
| 1988-06-01 | 59.0  |
| 1988-06-02 | 59.0  |
| 1988-06-03 | 59.0  |
| 1988-06-04 | 61.0  |
| 1988-06-05 | 60.0  |
| 1988-06-06 | 63.0  |
| 1988-06-07 | 61.0  |
| 1988-06-08 | 62.0  |
| 1988-06-09 | 62.0  |
| 1988-06-10 | 62.0  |
| 1988-06-11 | 60.0  |
| 1988-06-12 | 58.0  |
| 1988-06-13 | 57.0  |
| 1988-06-14 | 55.0  |
| 1988-06-15 | 53.0  |
| 1988-06-16 | 51.0  |
| 1988-06-17 | 51.0  |
| 1988-06-18 | 51.0  |
| 1988-06-19 | 50.0  |
| 1988-06-20 | 50.0  |
| 1988-06-21 | 49.0  |
| 1988-06-22 | 48.0  |
| 1988-06-23 | 48.0  |
| 1988-06-24 | 48.0  |
| 1988-06-25 | 46.0  |
| 1988-06-26 | 47.0  |
| 1988-06-27 | 46.0  |
| 1988-06-28 | 45.0  |
| 1988-06-29 | 44.0  |
| 1988-06-30 | 41.0  |
| 1988-07-01 | 44.0  |
| 1988-07-02 | 44.0  |
| 1988-07-03 | 45.0  |
| 1988-07-04 | 45.0  |
| 1988-07-05 | 45.0  |
| 1988-07-06 | 45.0  |
| 1988-07-07 | 45.0  |
| 1988-07-08 | 44.0  |
| 1988-07-09 | 45.0  |
| 1988-07-10 | 45.0  |
| 1988-07-11 | 44.0  |
| 1988-07-12 | 44.0  |
| 1988-07-13 | 44.0  |
| 1988-07-14 | 42.0  |
| 1988-07-15 | 42.0  |
| 1988-07-16 | 42.0  |
| 1988-07-17 | 43.0  |
| 1988-07-18 | 44.0  |
| 1988-07-19 | 43.0  |
| 1988-07-20 | 43.0  |
| 1988-07-21 | 43.0  |
| 1988-07-22 | 43.0  |
| 1988-07-23 | 41.0  |
| 1988-07-24 | 42.0  |
| 1988-07-25 | 44.0  |
| 1988-07-26 | 43.0  |
| 1988-07-27 | 45.0  |
| 1988-07-28 | 44.0  |
| 1988-07-29 | 44.0  |
| 1988-07-30 | 46.0  |
| 1988-07-31 | 46.0  |
| 1988-08-01 | 46.0  |
| 1988-08-02 | 46.0  |
| 1988-08-03 | 46.0  |
| 1988-08-04 | 46.0  |
| 1988-08-05 | 46.0  |
| 1988-08-06 | 45.0  |
| 1988-08-07 | 43.0  |
| 1988-08-08 | 45.0  |
| 1988-08-09 | 46.0  |
| 1988-08-10 | 46.0  |
| 1988-08-11 | 45.0  |
| 1988-08-12 | 44.0  |
| 1988-08-13 | 45.0  |
| 1988-08-14 | 44.0  |
| 1988-08-15 | 45.0  |
| 1988-08-16 | 45.0  |
| 1988-08-17 | 44.0  |
| 1988-08-18 | 43.0  |
| 1988-08-19 | 44.0  |
| 1988-08-20 | 44.0  |
| 1988-08-21 | 44.0  |
| 1988-08-22 | 43.0  |
| 1988-08-23 | 43.0  |
| 1988-08-24 | 42.0  |
| 1988-08-25 | 43.0  |
| 1988-08-26 | 42.0  |
| 1988-08-27 | 43.0  |
| 1988-08-28 | 43.0  |
| 1988-08-29 | 43.0  |
| 1988-08-30 | 43.0  |
| 1988-08-31 | 43.0  |
| 1988-09-01 | 43.0  |
| 1988-09-02 | 43.0  |
| 1988-09-03 | 43.0  |
| 1988-09-04 | 43.0  |
| 1988-09-05 | 44.0  |
| 1988-09-06 | 44.0  |
| 1988-09-07 | 44.0  |
| 1988-09-08 | 43.0  |
| 1988-09-09 | 43.0  |
| 1988-09-10 | 42.0  |
| 1988-09-11 | 43.0  |
| 1988-09-12 | 43.0  |
| 1988-09-13 | 44.0  |
| 1988-09-14 | 43.0  |
| 1988-09-15 | 44.0  |
| 1988-09-16 | 43.0  |
| 1988-09-17 | 44.0  |
| 1988-09-18 | 45.0  |
| 1988-09-19 | 46.0  |
| 1988-09-20 | 46.0  |
| 1988-09-21 | 47.0  |
| 1988-09-22 | 47.0  |
| 1988-09-23 | 47.0  |
| 1988-09-24 | 46.0  |
| 1988-09-25 | 46.0  |
| 1988-09-26 | 47.0  |
| 1988-09-27 | 48.0  |
| 1988-09-28 | 48.0  |
| 1988-09-29 | 48.0  |
| 1988-09-30 | 48.0  |
| 1988-10-01 | 48.0  |
| 1988-10-02 | 48.0  |
| 1988-10-03 | 48.0  |
| 1988-10-04 | 48.0  |
| 1988-10-05 | 48.0  |
| 1988-10-06 | 48.0  |
| 1988-10-07 | 49.0  |
| 1988-10-08 | 49.0  |
| 1988-10-09 | 49.0  |
| 1988-10-10 | 49.0  |
| 1988-10-11 | 49.0  |
| 1988-10-12 | 49.0  |
| 1988-10-13 | 49.0  |
| 1988-10-14 | 49.0  |
| 1988-10-15 | 49.0  |
| 1988-10-16 | 50.0  |
| 1988-10-17 | 51.0  |
| 1988-10-18 | 51.0  |
| 1988-10-19 | 51.0  |
| 1988-10-20 | 51.0  |
| 1988-10-21 | 51.0  |
| 1988-10-22 | 51.0  |
| 1988-10-23 | 51.0  |
| 1988-10-24 | 51.0  |
| 1988-10-25 | 51.0  |
| 1988-10-26 | 51.0  |
| 1988-10-27 | 51.0  |
| 1988-10-28 | 51.0  |
| 1988-10-29 | 51.0  |
| 1988-10-30 | 51.0  |
| 1988-10-31 | 51.0  |
| 1988-11-01 | 51.0  |
| 1988-11-02 | 52.0  |
| 1988-11-03 | 56.0  |
| 1988-11-04 | 55.0  |
| 1988-11-05 | 54.0  |
| 1988-11-06 | 58.0  |
| 1988-11-07 | 59.0  |
| 1988-11-08 | 60.0  |
| 1988-11-09 | 61.0  |
| 1988-11-10 | 64.0  |
| 1988-11-11 | 64.0  |
| 1988-11-12 | 64.0  |
| 1988-11-13 | 64.0  |
| 1988-11-14 | 64.0  |
| 1988-11-15 | 64.0  |
| 1988-11-16 | 64.0  |
| 1988-11-17 | 64.0  |
| 1988-11-18 | 62.0  |
| 1988-11-19 | 60.0  |
| 1988-11-20 | 60.0  |
| 1988-11-21 | 60.0  |
| 1988-11-22 | 66.0  |
| 1988-11-23 | 73.0  |
| 1988-11-24 | 66.0  |
| 1988-11-25 | 65.0  |
| 1988-11-26 | 64.0  |
| 1988-11-27 | 62.0  |
| 1988-11-28 | 64.0  |
| 1988-11-29 | 63.0  |
| 1988-11-30 | 61.0  |
| 1988-12-01 | 61.0  |
| 1988-12-02 | 60.0  |
| 1988-12-03 | 59.0  |
| 1988-12-04 | 58.0  |
| 1988-12-05 | 58.0  |
| 1988-12-06 | 57.0  |
| 1988-12-07 | 58.0  |
| 1988-12-08 | 57.0  |
| 1988-12-09 | 57.0  |
| 1988-12-10 | 56.0  |
| 1988-12-11 | 56.0  |
| 1988-12-12 | 55.0  |
| 1988-12-13 | 55.0  |
| 1988-12-14 | 55.0  |
| 1988-12-15 | 54.0  |
| 1988-12-16 | 53.0  |
| 1988-12-17 | 53.0  |
| 1988-12-18 | 53.0  |
| 1988-12-19 | 53.0  |
| 1988-12-20 | 53.0  |
| 1988-12-21 | 53.0  |
| 1988-12-22 | 53.0  |
| 1988-12-23 | 54.0  |
| 1988-12-24 | 53.0  |
| 1988-12-25 | 53.0  |
| 1988-12-26 | 53.0  |
| 1988-12-27 | 52.0  |
| 1988-12-28 | 52.0  |
| 1988-12-29 | 52.0  |
| 1988-12-30 | 53.0  |
| 1988-12-31 | 53.0  |
| 1989-01-01 | 52.0  |
| 1989-01-02 | 52.0  |
| 1989-01-03 | 53.0  |
| 1989-01-04 | 52.0  |
| 1989-01-05 | 53.0  |
| 1989-01-06 | 54.0  |
| 1989-01-07 | 54.0  |
| 1989-01-08 | 54.0  |
| 1989-01-09 | 55.0  |
| 1989-01-10 | 57.0  |
| 1989-01-11 | 55.0  |
| 1989-01-12 | 54.0  |
| 1989-01-13 | 54.0  |
| 1989-01-14 | 54.0  |
| 1989-01-15 | 54.0  |
| 1989-01-16 | 54.0  |
| 1989-01-17 | 54.0  |
| 1989-01-18 | 54.0  |
| 1989-01-19 | 54.0  |
| 1989-01-20 | 54.0  |
| 1989-01-21 | 54.0  |
| 1989-01-22 | 54.0  |
| 1989-01-23 | 54.0  |
| 1989-01-24 | 54.0  |
| 1989-01-25 | 53.0  |
| 1989-01-26 | 53.0  |
| 1989-01-27 | 52.0  |
| 1989-01-28 | 52.0  |
| 1989-01-29 | 52.0  |
| 1989-01-30 | 52.0  |
| 1989-01-31 | 52.0  |
| 1989-02-01 | 52.0  |
| 1989-02-02 | 52.0  |
| 1989-02-03 | 51.0  |
| 1989-02-04 | 50.0  |
| 1989-02-05 | 50.0  |
| 1989-02-06 | 49.0  |
| 1989-02-07 | 50.0  |
| 1989-02-08 | 51.0  |
| 1989-02-09 | 52.0  |
| 1989-02-10 | 53.0  |
| 1989-02-11 | 54.0  |
| 1989-02-12 | 55.0  |
| 1989-02-13 | 56.0  |
| 1989-02-14 | 56.0  |
| 1989-02-15 | 56.0  |
| 1989-02-16 | 57.0  |
| 1989-02-17 | 57.0  |
| 1989-02-18 | 59.0  |
| 1989-02-19 | 60.0  |
| 1989-02-20 | 61.0  |
| 1989-02-21 | 61.0  |
| 1989-02-22 | 64.0  |
| 1989-02-23 | 67.0  |
| 1989-02-24 | 68.0  |
| 1989-02-25 | 68.0  |
| 1989-02-26 | 69.0  |
| 1989-02-27 | 71.0  |
| 1989-02-28 | 73.0  |
| 1989-03-01 | 74.0  |
| 1989-03-02 | 76.0  |
| 1989-03-03 | 75.0  |
| 1989-03-04 | 74.0  |
| 1989-03-05 | 76.0  |
| 1989-03-06 | 82.0  |
| 1989-03-07 | 88.0  |
| 1989-03-08 | 88.0  |
| 1989-03-09 | 96.0  |
| 1989-03-10 | 106.0 |
| 1989-03-11 | 103.0 |
| 1989-03-12 | 99.0  |
| 1989-03-13 | 96.0  |
| 1989-03-14 | 95.0  |
| 1989-03-15 | 94.0  |
| 1989-03-16 | 94.0  |
| 1989-03-17 | 94.0  |
| 1989-03-18 | 93.0  |
| 1989-03-19 | 94.0  |
| 1989-03-20 | 92.0  |
| 1989-03-21 | 92.0  |
| 1989-03-22 | 93.0  |
| 1989-03-23 | 92.0  |
| 1989-03-24 | 92.0  |
| 1989-03-25 | 92.0  |
| 1989-03-26 | 91.0  |
| 1989-03-27 | 89.0  |
| 1989-03-28 | 90.0  |
| 1989-03-29 | 91.0  |
| 1989-03-30 | 89.0  |
| 1989-03-31 | 94.0  |
| 1989-04-01 | 92.0  |
| 1989-04-02 | 92.0  |
| 1989-04-03 | 92.0  |
| 1989-04-04 | 90.0  |
| 1989-04-05 | 89.0  |
| 1989-04-06 | 89.0  |
| 1989-04-07 | 91.0  |
| 1989-04-08 | 94.0  |
| 1989-04-09 | 96.0  |
| 1989-04-10 | 100.0 |
| 1989-04-11 | 101.0 |
| 1989-04-12 | 104.0 |
| 1989-04-13 | 107.0 |
| 1989-04-14 | 108.0 |
| 1989-04-15 | 110.0 |
| 1989-04-16 | 114.0 |
| 1989-04-17 | 118.0 |
| 1989-04-18 | 121.0 |
| 1989-04-19 | 123.0 |
| 1989-04-20 | 125.0 |
| 1989-04-21 | 131.0 |
| 1989-04-22 | 141.0 |
| 1989-04-23 | 136.0 |
| 1989-04-24 | 134.0 |
| 1989-04-25 | 135.0 |
| 1989-04-26 | 131.0 |
| 1989-04-27 | 133.0 |
| 1989-04-28 | 127.0 |
| 1989-04-29 | 119.0 |
| 1989-04-30 | 116.0 |
| 1989-05-01 | 116.0 |
| 1989-05-02 | 115.0 |
| 1989-05-03 | 114.0 |
| 1989-05-04 | 114.0 |
| 1989-05-05 | 114.0 |
| 1989-05-06 | 114.0 |
| 1989-05-07 | 115.0 |
| 1989-05-08 | 117.0 |
| 1989-05-09 | 129.0 |
| 1989-05-10 | 135.0 |
| 1989-05-11 | 128.0 |
| 1989-05-12 | 121.0 |
| 1989-05-13 | 118.0 |
| 1989-05-14 | 114.0 |
| 1989-05-15 | 110.0 |
| 1989-05-16 | 106.0 |
| 1989-05-17 | 101.0 |
| 1989-05-18 | 96.0  |
| 1989-05-19 | 96.0  |
| 1989-05-20 | 95.0  |
| 1989-05-21 | 94.0  |
| 1989-05-22 | 93.0  |
| 1989-05-23 | 97.0  |
| 1989-05-24 | 102.0 |
| 1989-05-25 | 99.0  |
| 1989-05-26 | 95.0  |
| 1989-05-27 | 91.0  |
| 1989-05-28 | 89.0  |
| 1989-05-29 | 85.0  |
| 1989-05-30 | 82.0  |
| 1989-05-31 | 79.0  |
| 1989-06-01 | 78.0  |
| 1989-06-02 | 76.0  |
| 1989-06-03 | 76.0  |
| 1989-06-04 | 78.0  |
| 1989-06-05 | 79.0  |
| 1989-06-06 | 80.0  |
| 1989-06-07 | 78.0  |
| 1989-06-08 | 76.0  |
| 1989-06-09 | 76.0  |
| 1989-06-10 | 75.0  |
| 1989-06-11 | 74.0  |
| 1989-06-12 | 74.0  |
| 1989-06-13 | 73.0  |
| 1989-06-14 | 73.0  |
| 1989-06-15 | 73.0  |
| 1989-06-16 | 74.0  |
| 1989-06-17 | 72.0  |
| 1989-06-18 | 70.0  |
| 1989-06-19 | 68.0  |
| 1989-06-20 | 66.0  |
| 1989-06-21 | 65.0  |
| 1989-06-22 | 64.0  |
| 1989-06-23 | 62.0  |
| 1989-06-24 | 61.0  |
| 1989-06-25 | 61.0  |
| 1989-06-26 | 60.0  |
| 1989-06-27 | 58.0  |
| 1989-06-28 | 59.0  |
| 1989-06-29 | 59.0  |
| 1989-06-30 | 58.0  |
| 1989-07-01 | 58.0  |
| 1989-07-02 | 55.0  |
| 1989-07-03 | 53.0  |
| 1989-07-04 | 53.0  |
| 1989-07-05 | 53.0  |
| 1989-07-06 | 53.0  |
| 1989-07-07 | 54.0  |
| 1989-07-08 | 57.0  |
| 1989-07-09 | 57.0  |
| 1989-07-10 | 58.0  |
| 1989-07-11 | 57.0  |
| 1989-07-12 | 55.0  |
| 1989-07-13 | 55.0  |
| 1989-07-14 | 54.0  |
| 1989-07-15 | 53.0  |
| 1989-07-16 | 53.0  |
| 1989-07-17 | 52.0  |
| 1989-07-18 | 51.0  |
| 1989-07-19 | 50.0  |
| 1989-07-20 | 51.0  |
| 1989-07-21 | 51.0  |
| 1989-07-22 | 50.0  |
| 1989-07-23 | 50.0  |
| 1989-07-24 | 50.0  |
| 1989-07-25 | 49.0  |
| 1989-07-26 | 46.0  |
| 1989-07-27 | 44.0  |
| 1989-07-28 | 43.0  |
| 1989-07-29 | 42.0  |
| 1989-07-30 | 42.0  |
| 1989-07-31 | 40.0  |
| 1989-08-01 | 42.0  |
| 1989-08-02 | 42.0  |
| 1989-08-03 | 43.0  |
| 1989-08-04 | 43.0  |
| 1989-08-05 | 42.0  |
| 1989-08-06 | 43.0  |
| 1989-08-07 | 42.0  |
| 1989-08-08 | 44.0  |
| 1989-08-09 | 46.0  |
| 1989-08-10 | 46.0  |
| 1989-08-11 | 47.0  |
| 1989-08-12 | 47.0  |
| 1989-08-13 | 46.0  |
| 1989-08-14 | 46.0  |
| 1989-08-15 | 46.0  |
| 1989-08-16 | 45.0  |
| 1989-08-17 | 45.0  |
| 1989-08-18 | 43.0  |
| 1989-08-19 | 42.0  |
| 1989-08-20 | 44.0  |
| 1989-08-21 | 45.0  |
| 1989-08-22 | 45.0  |
| 1989-08-23 | 45.0  |
| 1989-08-24 | 47.0  |
| 1989-08-25 | 48.0  |
| 1989-08-26 | 47.0  |
| 1989-08-27 | 47.0  |
| 1989-08-28 | 46.0  |
| 1989-08-29 | 45.0  |
| 1989-08-30 | 46.0  |
| 1989-08-31 | 47.0  |
| 1989-09-01 | 48.0  |
| 1989-09-02 | 47.0  |
| 1989-09-03 | 47.0  |
| 1989-09-04 | 47.0  |
| 1989-09-05 | 47.0  |
| 1989-09-06 | 47.0  |
| 1989-09-07 | 47.0  |
| 1989-09-08 | 46.0  |
| 1989-09-09 | 46.0  |
| 1989-09-10 | 46.0  |
| 1989-09-11 | 46.0  |
| 1989-09-12 | 46.0  |
| 1989-09-13 | 46.0  |
| 1989-09-14 | 46.0  |
| 1989-09-15 | 46.0  |
| 1989-09-16 | 46.0  |
| 1989-09-17 | 51.0  |
| 1989-09-18 | 56.0  |
| 1989-09-19 | 53.0  |
| 1989-09-20 | 51.0  |
| 1989-09-21 | 51.0  |
| 1989-09-22 | 50.0  |
| 1989-09-23 | 50.0  |
| 1989-09-24 | 49.0  |
| 1989-09-25 | 49.0  |
| 1989-09-26 | 49.0  |
| 1989-09-27 | 51.0  |
| 1989-09-28 | 54.0  |
| 1989-09-29 | 55.0  |
| 1989-09-30 | 55.0  |
| 1989-10-01 | 55.0  |
| 1989-10-02 | 54.0  |
| 1989-10-03 | 53.0  |
| 1989-10-04 | 53.0  |
| 1989-10-05 | 55.0  |
| 1989-10-06 | 56.0  |
| 1989-10-07 | 55.0  |
| 1989-10-08 | 55.0  |
| 1989-10-09 | 54.0  |
| 1989-10-10 | 54.0  |
| 1989-10-11 | 53.0  |
| 1989-10-12 | 53.0  |
| 1989-10-13 | 53.0  |
| 1989-10-14 | 53.0  |
| 1989-10-15 | 52.0  |
| 1989-10-16 | 52.0  |
| 1989-10-17 | 52.0  |
| 1989-10-18 | 52.0  |
| 1989-10-19 | 51.0  |
| 1989-10-20 | 50.0  |
| 1989-10-21 | 50.0  |
| 1989-10-22 | 51.0  |
| 1989-10-23 | 53.0  |
| 1989-10-24 | 54.0  |
| 1989-10-25 | 52.0  |
| 1989-10-26 | 52.0  |
| 1989-10-27 | 53.0  |
| 1989-10-28 | 54.0  |
| 1989-10-29 | 53.0  |
| 1989-10-30 | 53.0  |
| 1989-10-31 | 53.0  |
| 1989-11-01 | 53.0  |
| 1989-11-02 | 53.0  |
| 1989-11-03 | 52.0  |
| 1989-11-04 | 53.0  |
| 1989-11-05 | 52.0  |
| 1989-11-06 | 52.0  |
| 1989-11-07 | 52.0  |
| 1989-11-08 | 53.0  |
| 1989-11-09 | 57.0  |
| 1989-11-10 | 58.0  |
| 1989-11-11 | 57.0  |
| 1989-11-12 | 56.0  |
| 1989-11-13 | 55.0  |
| 1989-11-14 | 53.0  |
| 1989-11-15 | 52.0  |
| 1989-11-16 | 52.0  |
| 1989-11-17 | 52.0  |
| 1989-11-18 | 52.0  |
| 1989-11-19 | 52.0  |
| 1989-11-20 | 52.0  |
| 1989-11-21 | 52.0  |
| 1989-11-22 | 52.0  |
| 1989-11-23 | 52.0  |
| 1989-11-24 | 52.0  |
| 1989-11-25 | 52.0  |
| 1989-11-26 | 52.0  |
| 1989-11-27 | 52.0  |
| 1989-11-28 | 52.0  |
| 1989-11-29 | 50.0  |
| 1989-11-30 | 51.0  |
| 1989-12-01 | 50.0  |
| 1989-12-02 | 50.0  |
| 1989-12-03 | 50.0  |
| 1989-12-04 | 51.0  |
| 1989-12-05 | 54.0  |
| 1989-12-06 | 55.0  |
| 1989-12-07 | 53.0  |
| 1989-12-08 | 53.0  |
| 1989-12-09 | 54.0  |
| 1989-12-10 | 52.0  |
| 1989-12-11 | 50.0  |
| 1989-12-12 | 48.0  |
| 1989-12-13 | 54.0  |
| 1989-12-14 | 55.0  |
| 1989-12-15 | 56.0  |
| 1989-12-16 | 57.0  |
| 1989-12-17 | 60.0  |
| 1989-12-18 | 60.0  |
| 1989-12-19 | 60.0  |
| 1989-12-20 | 60.0  |
| 1989-12-21 | 60.0  |
| 1989-12-22 | 60.0  |
| 1989-12-23 | 56.0  |
| 1989-12-24 | 55.0  |
| 1989-12-25 | 55.0  |
| 1989-12-26 | 55.0  |
| 1989-12-27 | 55.0  |
| 1989-12-28 | 54.0  |
| 1989-12-29 | 55.0  |
| 1989-12-30 | 54.0  |
| 1989-12-31 | 53.0  |
| 1990-01-01 | 53.0  |
| 1990-01-02 | 50.0  |
| 1990-01-03 | 45.0  |
| 1990-01-04 | 52.0  |
| 1990-01-05 | 56.0  |
| 1990-01-06 | 54.0  |
| 1990-01-07 | 58.0  |
| 1990-01-08 | 74.0  |
| 1990-01-09 | 64.0  |
| 1990-01-10 | 62.0  |
| 1990-01-11 | 61.0  |
| 1990-01-12 | 61.0  |
| 1990-01-13 | 62.0  |
| 1990-01-14 | 62.0  |
| 1990-01-15 | 62.0  |
| 1990-01-16 | 62.0  |
| 1990-01-17 | 62.0  |
| 1990-01-18 | 60.0  |
| 1990-01-19 | 56.0  |
| 1990-01-20 | 56.0  |
| 1990-01-21 | 56.0  |
| 1990-01-22 | 59.0  |
| 1990-01-23 | 59.0  |
| 1990-01-24 | 58.0  |
| 1990-01-25 | 58.0  |
| 1990-01-26 | 58.0  |
| 1990-01-27 | 58.0  |
| 1990-01-28 | 58.0  |
| 1990-01-29 | 58.0  |
| 1990-01-30 | 58.0  |
| 1990-01-31 | 57.0  |
| 1990-02-01 | 57.0  |
| 1990-02-02 | 57.0  |
| 1990-02-03 | 57.0  |
| 1990-02-04 | 57.0  |
| 1990-02-05 | 57.0  |
| 1990-02-06 | 57.0  |
| 1990-02-07 | 59.0  |
| 1990-02-08 | 57.0  |
| 1990-02-09 | 57.0  |
| 1990-02-10 | 57.0  |
| 1990-02-11 | 57.0  |
| 1990-02-12 | 57.0  |
| 1990-02-13 | 57.0  |
| 1990-02-14 | 52.0  |
| 1990-02-15 | 50.0  |
| 1990-02-16 | 52.0  |
| 1990-02-17 | 56.0  |
| 1990-02-18 | 58.0  |
| 1990-02-19 | 58.0  |
| 1990-02-20 | 55.0  |
| 1990-02-21 | 56.0  |
| 1990-02-22 | 57.0  |
| 1990-02-23 | 57.0  |
| 1990-02-24 | 58.0  |
| 1990-02-25 | 60.0  |
| 1990-02-26 | 61.0  |
| 1990-02-27 | 61.0  |
| 1990-02-28 | 61.0  |
| 1990-03-01 | 61.0  |
| 1990-03-02 | 61.0  |
| 1990-03-03 | 63.0  |
| 1990-03-04 | 63.0  |
| 1990-03-05 | 63.0  |
| 1990-03-06 | 63.0  |
| 1990-03-07 | 62.0  |
| 1990-03-08 | 62.0  |
| 1990-03-09 | 62.0  |
| 1990-03-10 | 62.0  |
| 1990-03-11 | 61.0  |
| 1990-03-12 | 61.0  |
| 1990-03-13 | 61.0  |
| 1990-03-14 | 62.0  |
| 1990-03-15 | 62.0  |
| 1990-03-16 | 61.0  |
| 1990-03-17 | 61.0  |
| 1990-03-18 | 62.0  |
| 1990-03-19 | 61.0  |
| 1990-03-20 | 61.0  |
| 1990-03-21 | 61.0  |
| 1990-03-22 | 61.0  |
| 1990-03-23 | 61.0  |
| 1990-03-24 | 61.0  |
| 1990-03-25 | 61.0  |
| 1990-03-26 | 63.0  |
| 1990-03-27 | 64.0  |
| 1990-03-28 | 62.0  |
| 1990-03-29 | 62.0  |
| 1990-03-30 | 62.0  |
| 1990-03-31 | 62.0  |
| 1990-04-01 | 61.0  |
| 1990-04-02 | 62.0  |
| 1990-04-03 | 61.0  |
| 1990-04-04 | 61.0  |
| 1990-04-05 | 61.0  |
| 1990-04-06 | 61.0  |
| 1990-04-07 | 61.0  |
| 1990-04-08 | 61.0  |
| 1990-04-09 | 60.0  |
| 1990-04-10 | 60.0  |
| 1990-04-11 | 60.0  |
| 1990-04-12 | 59.0  |
| 1990-04-13 | 59.0  |
| 1990-04-14 | 59.0  |
| 1990-04-15 | 59.0  |
| 1990-04-16 | 60.0  |
| 1990-04-17 | 62.0  |
| 1990-04-18 | 58.0  |
| 1990-04-19 | 56.0  |
| 1990-04-20 | 56.0  |
| 1990-04-21 | 56.0  |
| 1990-04-22 | 56.0  |
| 1990-04-23 | 58.0  |
| 1990-04-24 | 59.0  |
| 1990-04-25 | 57.0  |
| 1990-04-26 | 56.0  |
| 1990-04-27 | 56.0  |
| 1990-04-28 | 57.0  |
| 1990-04-29 | 56.0  |
| 1990-04-30 | 56.0  |
| 1990-05-01 | 55.0  |
| 1990-05-02 | 55.0  |
| 1990-05-03 | 54.0  |
| 1990-05-04 | 54.0  |
| 1990-05-05 | 54.0  |
| 1990-05-06 | 53.0  |
| 1990-05-07 | 51.0  |
| 1990-05-08 | 50.0  |
| 1990-05-09 | 49.0  |
| 1990-05-10 | 47.0  |
| 1990-05-11 | 47.0  |
| 1990-05-12 | 45.0  |
| 1990-05-13 | 46.0  |
| 1990-05-14 | 45.0  |
| 1990-05-15 | 42.0  |
| 1990-05-16 | 42.0  |
| 1990-05-17 | 42.0  |
| 1990-05-18 | 43.0  |
| 1990-05-19 | 43.0  |
| 1990-05-20 | 44.0  |
| 1990-05-21 | 45.0  |
| 1990-05-22 | 46.0  |
| 1990-05-23 | 52.0  |
| 1990-05-24 | 50.0  |
| 1990-05-25 | 45.0  |
| 1990-05-26 | 45.0  |
| 1990-05-27 | 45.0  |
| 1990-05-28 | 46.0  |
| 1990-05-29 | 46.0  |
| 1990-05-30 | 47.0  |
| 1990-05-31 | 50.0  |
| 1990-06-01 | 50.0  |
| 1990-06-02 | 49.0  |
| 1990-06-03 | 51.0  |
| 1990-06-04 | 52.0  |
| 1990-06-05 | 51.0  |
| 1990-06-06 | 52.0  |
| 1990-06-07 | 54.0  |
| 1990-06-08 | 53.0  |
| 1990-06-09 | 51.0  |
| 1990-06-10 | 51.0  |
| 1990-06-11 | 49.0  |
| 1990-06-12 | 48.0  |
| 1990-06-13 | 49.0  |
| 1990-06-14 | 49.0  |
| 1990-06-15 | 49.0  |
| 1990-06-16 | 51.0  |
| 1990-06-17 | 53.0  |
| 1990-06-18 | 51.0  |
| 1990-06-19 | 50.0  |
| 1990-06-20 | 50.0  |
| 1990-06-21 | 48.0  |
| 1990-06-22 | 46.0  |
| 1990-06-23 | 48.0  |
| 1990-06-24 | 48.0  |
| 1990-06-25 | 47.0  |
| 1990-06-26 | 47.0  |
| 1990-06-27 | 49.0  |
| 1990-06-28 | 49.0  |
| 1990-06-29 | 48.0  |
| 1990-06-30 | 48.0  |
| 1990-07-01 | 48.0  |
| 1990-07-02 | 47.0  |
| 1990-07-03 | 46.0  |
| 1990-07-04 | 44.0  |
| 1990-07-05 | 46.0  |
| 1990-07-06 | 45.0  |
| 1990-07-07 | 44.0  |
| 1990-07-08 | 43.0  |
| 1990-07-09 | 41.0  |
| 1990-07-10 | 39.0  |
| 1990-07-11 | 40.0  |
| 1990-07-12 | 40.0  |
| 1990-07-13 | 40.0  |
| 1990-07-14 | 40.0  |
| 1990-07-15 | 39.0  |
| 1990-07-16 | 39.0  |
| 1990-07-17 | 39.0  |
| 1990-07-18 | 39.0  |
| 1990-07-19 | 40.0  |
| 1990-07-20 | 40.0  |
| 1990-07-21 | 40.0  |
| 1990-07-22 | 41.0  |
| 1990-07-23 | 41.0  |
| 1990-07-24 | 39.0  |
| 1990-07-25 | 41.0  |
| 1990-07-26 | 42.0  |
| 1990-07-27 | 40.0  |
| 1990-07-28 | 39.0  |
| 1990-07-29 | 41.0  |
| 1990-07-30 | 41.0  |
| 1990-07-31 | 40.0  |
| 1990-08-01 | 43.0  |
| 1990-08-02 | 42.0  |
| 1990-08-03 | 42.0  |
| 1990-08-04 | 42.0  |
| 1990-08-05 | 42.0  |
| 1990-08-06 | 42.0  |
| 1990-08-07 | 42.0  |
| 1990-08-08 | 42.0  |
| 1990-08-09 | 42.0  |
| 1990-08-10 | 42.0  |
| 1990-08-11 | 42.0  |
| 1990-08-12 | 42.0  |
| 1990-08-13 | 42.0  |
| 1990-08-14 | 41.0  |
| 1990-08-15 | 38.0  |
| 1990-08-16 | 39.0  |
| 1990-08-17 | 40.0  |
| 1990-08-18 | 42.0  |
| 1990-08-19 | 43.0  |
| 1990-08-20 | 44.0  |
| 1990-08-21 | 43.0  |
| 1990-08-22 | 43.0  |
| 1990-08-23 | 42.0  |
| 1990-08-24 | 41.0  |
| 1990-08-25 | 43.0  |
| 1990-08-26 | 43.0  |
| 1990-08-27 | 43.0  |
| 1990-08-28 | 43.0  |
| 1990-08-29 | 43.0  |
| 1990-08-30 | 44.0  |
| 1990-08-31 | 44.0  |
| 1990-09-01 | 43.0  |
| 1990-09-02 | 43.0  |
| 1990-09-03 | 43.0  |
| 1990-09-04 | 43.0  |
| 1990-09-05 | 43.0  |
| 1990-09-06 | 43.0  |
| 1990-09-07 | 43.0  |
| 1990-09-08 | 42.0  |
| 1990-09-09 | 42.0  |
| 1990-09-10 | 43.0  |
| 1990-09-11 | 44.0  |
| 1990-09-12 | 43.0  |
| 1990-09-13 | 42.0  |
| 1990-09-14 | 44.0  |
| 1990-09-15 | 43.0  |
| 1990-09-16 | 43.0  |
| 1990-09-17 | 43.0  |
| 1990-09-18 | 43.0  |
| 1990-09-19 | 43.0  |
| 1990-09-20 | 42.0  |
| 1990-09-21 | 41.0  |
| 1990-09-22 | 40.0  |
| 1990-09-23 | 42.0  |
| 1990-09-24 | 42.0  |
| 1990-09-25 | 43.0  |
| 1990-09-26 | 45.0  |
| 1990-09-27 | 46.0  |
| 1990-09-28 | 47.0  |
| 1990-09-29 | 46.0  |
| 1990-09-30 | 46.0  |
| 1990-10-01 | 45.0  |
| 1990-10-02 | 44.0  |
| 1990-10-03 | 44.0  |
| 1990-10-04 | 43.0  |
| 1990-10-05 | 43.0  |
| 1990-10-06 | 43.0  |
| 1990-10-07 | 43.0  |
| 1990-10-08 | 43.0  |
| 1990-10-09 | 43.0  |
| 1990-10-10 | 43.0  |
| 1990-10-11 | 43.0  |
| 1990-10-12 | 43.0  |
| 1990-10-13 | 43.0  |
| 1990-10-14 | 43.0  |
| 1990-10-15 | 43.0  |
| 1990-10-16 | 43.0  |
| 1990-10-17 | 43.0  |
| 1990-10-18 | 43.0  |
| 1990-10-19 | 43.0  |
| 1990-10-20 | 43.0  |
| 1990-10-21 | 43.0  |
| 1990-10-22 | 43.0  |
| 1990-10-23 | 43.0  |
| 1990-10-24 | 43.0  |
| 1990-10-25 | 43.0  |
| 1990-10-26 | 43.0  |
| 1990-10-27 | 42.0  |
| 1990-10-28 | 42.0  |
| 1990-10-29 | 43.0  |
| 1990-10-30 | 44.0  |
| 1990-10-31 | 45.0  |
| 1990-11-01 | 45.0  |
| 1990-11-02 | 46.0  |
| 1990-11-03 | 46.0  |
| 1990-11-04 | 47.0  |
| 1990-11-05 | 48.0  |
| 1990-11-06 | 48.0  |
| 1990-11-07 | 49.0  |
| 1990-11-08 | 49.0  |
| 1990-11-09 | 49.0  |
| 1990-11-10 | 49.0  |
| 1990-11-11 | 49.0  |
| 1990-11-12 | 49.0  |
| 1990-11-13 | 49.0  |
| 1990-11-14 | 49.0  |
| 1990-11-15 | 49.0  |
| 1990-11-16 | 49.0  |
| 1990-11-17 | 49.0  |
| 1990-11-18 | 49.0  |
| 1990-11-19 | 49.0  |
| 1990-11-20 | 49.0  |
| 1990-11-21 | 49.0  |
| 1990-11-22 | 49.0  |
| 1990-11-23 | 49.0  |
| 1990-11-24 | 49.0  |
| 1990-11-25 | 49.0  |
| 1990-11-26 | 50.0  |
| 1990-11-27 | 51.0  |
| 1990-11-28 | 53.0  |
| 1990-11-29 | 53.0  |
| 1990-11-30 | 53.0  |
| 1990-12-01 | 52.0  |
| 1990-12-02 | 51.0  |
| 1990-12-03 | 50.0  |
| 1990-12-04 | 50.0  |
| 1990-12-05 | 50.0  |
| 1990-12-06 | 49.0  |
| 1990-12-07 | 49.0  |
| 1990-12-08 | 49.0  |
| 1990-12-09 | 49.0  |
| 1990-12-10 | 53.0  |
| 1990-12-11 | 53.0  |
| 1990-12-12 | 50.0  |
| 1990-12-13 | 49.0  |
| 1990-12-14 | 48.0  |
| 1990-12-15 | 49.0  |
| 1990-12-16 | 49.0  |
| 1990-12-17 | 49.0  |
| 1990-12-18 | 49.0  |
| 1990-12-19 | 42.0  |
| 1990-12-20 | 37.0  |
| 1990-12-21 | 37.0  |
| 1990-12-22 | 37.0  |
| 1990-12-23 | 40.0  |
| 1990-12-24 | 43.0  |
| 1990-12-25 | 43.0  |
| 1990-12-26 | 43.0  |
| 1990-12-27 | 43.0  |
| 1990-12-28 | 42.0  |
| 1990-12-29 | 42.0  |
| 1990-12-30 | 42.0  |
| 1990-12-31 | 41.0  |
| 1991-01-01 | 40.0  |
| 1991-01-02 | 40.0  |
| 1991-01-03 | 40.0  |
| 1991-01-04 | 40.0  |
| 1991-01-05 | 40.0  |
| 1991-01-06 | 40.0  |
| 1991-01-07 | 42.0  |
| 1991-01-08 | 43.0  |
| 1991-01-09 | 44.0  |
| 1991-01-10 | 45.0  |
| 1991-01-11 | 45.0  |
| 1991-01-12 | 52.0  |
| 1991-01-13 | 53.0  |
| 1991-01-14 | 53.0  |
| 1991-01-15 | 54.0  |
| 1991-01-16 | 53.0  |
| 1991-01-17 | 52.0  |
| 1991-01-18 | 52.0  |
| 1991-01-19 | 52.0  |
| 1991-01-20 | 51.0  |
| 1991-01-21 | 51.0  |
| 1991-01-22 | 50.0  |
| 1991-01-23 | 50.0  |
| 1991-01-24 | 50.0  |
| 1991-01-25 | 51.0  |
| 1991-01-26 | 50.0  |
| 1991-01-27 | 50.0  |
| 1991-01-28 | 50.0  |
| 1991-01-29 | 49.0  |
| 1991-01-30 | 49.0  |
| 1991-01-31 | 49.0  |
| 1991-02-01 | 49.0  |
| 1991-02-02 | 50.0  |
| 1991-02-03 | 52.0  |
| 1991-02-04 | 53.0  |
| 1991-02-05 | 55.0  |
| 1991-02-06 | 53.0  |
| 1991-02-07 | 52.0  |
| 1991-02-08 | 52.0  |
| 1991-02-09 | 52.0  |
| 1991-02-10 | 51.0  |
| 1991-02-11 | 51.0  |
| 1991-02-12 | 51.0  |
| 1991-02-13 | 51.0  |
| 1991-02-14 | 52.0  |
| 1991-02-15 | 52.0  |
| 1991-02-16 | 52.0  |
| 1991-02-17 | 51.0  |
| 1991-02-18 | 51.0  |
| 1991-02-19 | 52.0  |
| 1991-02-20 | 52.0  |
| 1991-02-21 | 51.0  |
| 1991-02-22 | 51.0  |
| 1991-02-23 | 51.0  |
| 1991-02-24 | 51.0  |
| 1991-02-25 | 51.0  |
| 1991-02-26 | 51.0  |
| 1991-02-27 | 51.0  |
| 1991-02-28 | 51.0  |
| 1991-03-01 | 51.0  |
| 1991-03-02 | 51.0  |
| 1991-03-03 | 53.0  |
| 1991-03-04 | 56.0  |
| 1991-03-05 | 56.0  |
| 1991-03-06 | 53.0  |
| 1991-03-07 | 53.0  |
| 1991-03-08 | 53.0  |
| 1991-03-09 | 53.0  |
| 1991-03-10 | 53.0  |
| 1991-03-11 | 52.0  |
| 1991-03-12 | 53.0  |
| 1991-03-13 | 53.0  |
| 1991-03-14 | 53.0  |
| 1991-03-15 | 53.0  |
| 1991-03-16 | 53.0  |
| 1991-03-17 | 53.0  |
| 1991-03-18 | 53.0  |
| 1991-03-19 | 53.0  |
| 1991-03-20 | 53.0  |
| 1991-03-21 | 53.0  |
| 1991-03-22 | 53.0  |
| 1991-03-23 | 53.0  |
| 1991-03-24 | 54.0  |
| 1991-03-25 | 54.0  |
| 1991-03-26 | 55.0  |
| 1991-03-27 | 56.0  |
| 1991-03-28 | 55.0  |
| 1991-03-29 | 55.0  |
| 1991-03-30 | 55.0  |
| 1991-03-31 | 55.0  |
| 1991-04-01 | 55.0  |
| 1991-04-02 | 55.0  |
| 1991-04-03 | 55.0  |
| 1991-04-04 | 55.0  |
| 1991-04-05 | 54.0  |
| 1991-04-06 | 55.0  |
| 1991-04-07 | 54.0  |
| 1991-04-08 | 53.0  |
| 1991-04-09 | 54.0  |
| 1991-04-10 | 53.0  |
| 1991-04-11 | 53.0  |
| 1991-04-12 | 53.0  |
| 1991-04-13 | 53.0  |
| 1991-04-14 | 53.0  |
| 1991-04-15 | 53.0  |
| 1991-04-16 | 53.0  |
| 1991-04-17 | 53.0  |
| 1991-04-18 | 53.0  |
| 1991-04-19 | 53.0  |
| 1991-04-20 | 53.0  |
| 1991-04-21 | 55.0  |
| 1991-04-22 | 56.0  |
| 1991-04-23 | 56.0  |
| 1991-04-24 | 56.0  |
| 1991-04-25 | 55.0  |
| 1991-04-26 | 55.0  |
| 1991-04-27 | 55.0  |
| 1991-04-28 | 53.0  |
| 1991-04-29 | 53.0  |
| 1991-04-30 | 52.0  |
| 1991-05-01 | 52.0  |
| 1991-05-02 | 52.0  |
| 1991-05-03 | 52.0  |
| 1991-05-04 | 52.0  |
| 1991-05-05 | 52.0  |
| 1991-05-06 | 51.0  |
| 1991-05-07 | 49.0  |
| 1991-05-08 | 50.0  |
| 1991-05-09 | 50.0  |
| 1991-05-10 | 50.0  |
| 1991-05-11 | 50.0  |
| 1991-05-12 | 51.0  |
| 1991-05-13 | 53.0  |
| 1991-05-14 | 55.0  |
| 1991-05-15 | 53.0  |
| 1991-05-16 | 55.0  |
| 1991-05-17 | 61.0  |
| 1991-05-18 | 62.0  |
| 1991-05-19 | 61.0  |
| 1991-05-20 | 61.0  |
| 1991-05-21 | 61.0  |
| 1991-05-22 | 61.0  |
| 1991-05-23 | 60.0  |
| 1991-05-24 | 60.0  |
| 1991-05-25 | 59.0  |
| 1991-05-26 | 59.0  |
| 1991-05-27 | 58.0  |
| 1991-05-28 | 57.0  |
| 1991-05-29 | 57.0  |
| 1991-05-30 | 57.0  |
| 1991-05-31 | 56.0  |
| 1991-06-01 | 56.0  |
| 1991-06-02 | 56.0  |
| 1991-06-03 | 56.0  |
| 1991-06-04 | 56.0  |
| 1991-06-05 | 56.0  |
| 1991-06-06 | 56.0  |
| 1991-06-07 | 55.0  |
| 1991-06-08 | 55.0  |
| 1991-06-09 | 53.0  |
| 1991-06-10 | 54.0  |
| 1991-06-11 | 54.0  |
| 1991-06-12 | 53.0  |
| 1991-06-13 | 51.0  |
| 1991-06-14 | 51.0  |
| 1991-06-15 | 51.0  |
| 1991-06-16 | 51.0  |
| 1991-06-17 | 50.0  |
| 1991-06-18 | 51.0  |
| 1991-06-19 | 52.0  |
| 1991-06-20 | 54.0  |
| 1991-06-21 | 52.0  |
| 1991-06-22 | 51.0  |
| 1991-06-23 | 51.0  |
| 1991-06-24 | 52.0  |
| 1991-06-25 | 52.0  |
| 1991-06-26 | 51.0  |
| 1991-06-27 | 51.0  |
| 1991-06-28 | 55.0  |
| 1991-06-29 | 52.0  |
| 1991-06-30 | 51.0  |
| 1991-07-01 | 50.0  |
| 1991-07-02 | 50.0  |
| 1991-07-03 | 49.0  |
| 1991-07-04 | 48.0  |
| 1991-07-05 | 48.0  |
| 1991-07-06 | 47.0  |
| 1991-07-07 | 47.0  |
| 1991-07-08 | 47.0  |
| 1991-07-09 | 47.0  |
| 1991-07-10 | 46.0  |
| 1991-07-11 | 46.0  |
| 1991-07-12 | 46.0  |
| 1991-07-13 | 46.0  |
| 1991-07-14 | 46.0  |
| 1991-07-15 | 46.0  |
| 1991-07-16 | 46.0  |
| 1991-07-17 | 49.0  |
| 1991-07-18 | 47.0  |
| 1991-07-19 | 46.0  |
| 1991-07-20 | 46.0  |
| 1991-07-21 | 46.0  |
| 1991-07-22 | 46.0  |
| 1991-07-23 | 46.0  |
| 1991-07-24 | 46.0  |
| 1991-07-25 | 46.0  |
| 1991-07-26 | 45.0  |
| 1991-07-27 | 45.0  |
| 1991-07-28 | 44.0  |
| 1991-07-29 | 43.0  |
| 1991-07-30 | 40.0  |
| 1991-07-31 | 40.0  |
| 1991-08-01 | 40.0  |
| 1991-08-02 | 40.0  |
| 1991-08-03 | 40.0  |
| 1991-08-04 | 40.0  |
| 1991-08-05 | 40.0  |
| 1991-08-06 | 41.0  |
| 1991-08-07 | 41.0  |
| 1991-08-08 | 43.0  |
| 1991-08-09 | 43.0  |
| 1991-08-10 | 43.0  |
| 1991-08-11 | 43.0  |
| 1991-08-12 | 43.0  |
| 1991-08-13 | 43.0  |
| 1991-08-14 | 43.0  |
| 1991-08-15 | 45.0  |
| 1991-08-16 | 45.0  |
| 1991-08-17 | 45.0  |
| 1991-08-18 | 45.0  |
| 1991-08-19 | 44.0  |
| 1991-08-20 | 43.0  |
| 1991-08-21 | 45.0  |
| 1991-08-22 | 44.0  |
| 1991-08-23 | 43.0  |
| 1991-08-24 | 43.0  |
| 1991-08-25 | 42.0  |
| 1991-08-26 | 42.0  |
| 1991-08-27 | 42.0  |
| 1991-08-28 | 43.0  |
| 1991-08-29 | 43.0  |
| 1991-08-30 | 43.0  |
| 1991-08-31 | 42.0  |
| 1991-09-01 | 43.0  |
| 1991-09-02 | 43.0  |
| 1991-09-03 | 43.0  |
| 1991-09-04 | 43.0  |
| 1991-09-05 | 44.0  |
| 1991-09-06 | 45.0  |
| 1991-09-07 | 45.0  |
| 1991-09-08 | 43.0  |
| 1991-09-09 | 40.0  |
| 1991-09-10 | 42.0  |
| 1991-09-11 | 45.0  |
| 1991-09-12 | 44.0  |
| 1991-09-13 | 44.0  |
| 1991-09-14 | 43.0  |
| 1991-09-15 | 43.0  |
| 1991-09-16 | 43.0  |
| 1991-09-17 | 43.0  |
| 1991-09-18 | 43.0  |
| 1991-09-19 | 43.0  |
| 1991-09-20 | 43.0  |
| 1991-09-21 | 43.0  |
| 1991-09-22 | 43.0  |
| 1991-09-23 | 43.0  |
| 1991-09-24 | 43.0  |
| 1991-09-25 | 43.0  |
| 1991-09-26 | 43.0  |
| 1991-09-27 | 43.0  |
| 1991-09-28 | 43.0  |
| 1991-09-29 | 43.0  |
| 1991-09-30 | 43.0  |