| 1 | A | B | C | D |
| --- | --- | --- | --- | --- |
| 2 | foreign-controlled market shares (nominal) and changes, by period |  |  |  |
| 3 |  | three-year average foreign share | percentage change between the three-year averages | average annual growth rate |
| 4 |  | percent |  |  |
| 5 | 1973 to 1975 | 50.8 | .. | .. |
| 6 | 1984 to 1986 | 46.5 | .. | .. |
| 7 | 1997 to 1999 | 50.7 | .. | .. |
| 8 | 2009 to 2011 | 44.6 | .. | .. |
| 9 | between the 1973-to-1975 and 1984-to-1986 periods | .. | -8.4 | -0.8 |
| 10 | between the 1984-to-1986 and 1997-to-1999 periods | .. | 8.9 | 0.7 |
| 11 | between the 1973-to-1975 and 1997-to-1999 periods | .. | -0.2 | 0.0 |
| 12 | between the 1997-to-1999 and 2009-to-2011 periods | .. | -12.1 | -1.0 |
| 13 | between the 1973-to-1975 and 2009-to-2011 periods | .. | -12.3 | -0.3 |

Question: what was the average foreign share during the years 1973 to 1975 and during the years 2009 to 2011?
Answer: 50.8, 44.6

Question: what was the average annual growth rate between the 1973-to-1975 and 2009-to-2011 periods?
Answer: -0.3

Question: what was the percentage change between the 1973-to-1975 and 1984-to-1986 periods?
Answer: -8.4

Question: what was the average foreign share in 1997 to 1999?
Answer: 50.7