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 7, 2003 | Arizona Cardinals | W 42-24 | 60,691 |
| 2.0 | September 14, 2003 | at Green Bay Packers | L 31-6 | 70,244 |
| 3.0 | September 21, 2003 | Minnesota Vikings | L 23-13 | 60,865 |
| 4.0 | September 28, 2003 | at Denver Broncos | L 20-16 | 75,719 |
| 5.0 | October 5, 2003 | at San Francisco 49ers | L 24-17 | 67,365 |
| 6.0 | Bye | Bye | Bye | Bye |
| 7.0 | October 19, 2003 | Dallas Cowboys | L 38-7 | 61,160 |
| 8.0 | October 26, 2003 | at Chicago Bears | L 24-16 | 61,428 |
| 9.0 | November 2, 2003 | Oakland Raiders | W 23-13 | 61,561 |
| 10.0 | November 9, 2003 | Chicago Bears | W 12-10 | 61,492 |
| 11.0 | November 16, 2003 | at Seattle Seahawks | L 35-14 | 65,865 |
| 12.0 | November 23, 2003 | at Minnesota Vikings | L 24-14 | 63,946 |
| 13.0 | November 27, 2003 | Green Bay Packers | W 22-14 | 62,123 |
| 14.0 | December 7, 2003 | San Diego Chargers | L 14-7 | 61,544 |
| 15.0 | December 14, 2003 | at Kansas City Chiefs | L 45-17 | 77,922 |
| 16.0 | December 21, 2003 | at Carolina Panthers | L 20-14 | 72,835 |
| 17.0 | December 28, 2003 | St. Louis Rams | W 30-20 | 61,006 |
Question:
What is the Week number on October 5, 2003?
Answer:
5.0