Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1.0 | September 21, 1975 | at St. Louis Cardinals | L 23-20 | 42172.0 |
| 2.0 | September 28, 1975 | Detroit Lions | L 17-14 | 45218.0 |
| 3.0 | October 5, 1975 | New Orleans Saints | W 14-7 | 29444.0 |
| 4.0 | October 12, 1975 | at San Francisco 49ers | W 17-3 | 44043.0 |
| 5.0 | October 19, 1975 | at Los Angeles Rams | L 22-7 | 64843.0 |
| 6.0 | October 26, 1975 | Cincinnati Bengals | L 21-14 | 45811.0 |
| 7.0 | November 2, 1975 | at New Orleans Saints | L 23-7 | 49342.0 |
| 8.0 | November 9, 1975 | at Minnesota Vikings | L 38-0 | 43751.0 |
| 9.0 | November 16, 1975 | Los Angeles Rams | L 16-7 | 44595.0 |
| 10.0 | November 23, 1975 | Denver Broncos | W 35-21 | 28686.0 |
| 11.0 | November 30, 1975 | at Oakland Raiders | L 37-34 | 50860.0 |
| 12.0 | December 7, 1975 | Washington Redskins | L 30-27 | 52809.0 |
| 13.0 | December 14, 1975 | San Francisco 49ers | W 31-9 | 38501.0 |
| 14.0 | December 21, 1975 | at Green Bay Packers | L 22-13 | 56267.0 |
Question:
What was the highest attendance of games that resulted in L 23-20?
Answer:
42172.0