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 | Game site | Attendance |
| --- | --- | --- | --- | --- | --- |
| 1.0 | 1984-09-02 | at Indianapolis Colts | W 23–14 | Hoosier Dome | 61148.0 |
| 2.0 | 1984-09-06 | Pittsburgh Steelers | L 23–17 | The Meadowlands | 70564.0 |
| 3.0 | 1984-09-16 | Cincinnati Bengals | W 43–23 | The Meadowlands | 64193.0 |
| 4.0 | 1984-09-23 | at Buffalo Bills | W 28–26 | Rich Stadium | 48330.0 |
| 5.0 | 1984-09-30 | New England Patriots | L 28–21 | The Meadowlands | 68978.0 |
| 6.0 | 1984-10-07 | at Kansas City Chiefs | W 17–16 | Arrowhead Stadium | 51843.0 |
| 7.0 | 1984-10-14 | at Cleveland Browns | W 24–20 | Cleveland Municipal Stadium | 55673.0 |
| 8.0 | 1984-10-21 | Kansas City Chiefs | W 28–7 | The Meadowlands | 66782.0 |
| 9.0 | 1984-10-28 | at New England Patriots | L 30–20 | Sullivan Stadium | 60513.0 |
| 10.0 | 1984-11-04 | Miami Dolphins | L 31–17 | The Meadowlands | 72655.0 |
| 11.0 | 1984-11-11 | Indianapolis Colts | L 9–5 | The Meadowlands | 51066.0 |
| 12.0 | 1984-11-18 | at Houston Oilers | L 31–20 | The Astrodome | 40141.0 |
| 13.0 | 1984-11-26 | at Miami Dolphins | L 28–17 | Miami Orange Bowl | 74884.0 |
| 14.0 | 1984-12-02 | New York Giants | L 20–10 | The Meadowlands | 74975.0 |
| 15.0 | 1984-12-08 | Buffalo Bills | W 21–17 | The Meadowlands | 45378.0 |
| 16.0 | 1984-12-16 | at Tampa Bay Buccaneers | L 41–21 | Tampa Stadium | 43817.0 |
Question:
Name the average week for result of l 28–17
Answer:
13.0