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 | August 9, 1968 | at Los Angeles Rams | L 23–21 | 64020.0 |
| 2.0 | August 18, 1968 | at San Francisco 49ers | W 31–17 | 26801.0 |
| 3.0 | August 24, 1968 | at New Orleans Saints | L 40–27 | 70045.0 |
| 4.0 | August 30, 1968 | at Buffalo Bills | W 22–12 | 45448.0 |
| 5.0 | September 7, 1968 | Green Bay Packers | L 31–9 | 84918.0 |
Question:
What is the smallest attendance in week 1?
Answer:
64020.0