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:
| Year | Date | Winner | Result | Loser | Attendance | Location |
| --- | --- | --- | --- | --- | --- | --- |
| 1980 | Oct 19 | Chicago Bears | 24-7 | Detroit Lions |  | Chicago, Illinois |
| 1980 | Nov 27 | Chicago Bears | 23-17 (OT) | Detroit Lions | 58,508 | Pontiac, Michigan |
| 1981 | Oct 19 | Detroit Lions | 48-17 | Chicago Bears | 75,397 | Pontiac, Michigan |
| 1981 | Nov 22 | Detroit Lions | 23-7 | Chicago Bears | 71,273 | Chicago, Illinois |
| 1982 | Sept 12 | Detroit Lions | 17-10 | Chicago Bears | 50,082 | Pontiac, Michigan |
| 1982 | Nov 21 | Chicago Bears | 20-17 | Detroit Lions | 46,783 | Chicago, Illinois |
| 1983 | Oct 16 | Detroit Lions | 31–17 | Chicago Bears | 66,709 | Pontiac, Michigan |
| 1983 | Oct 30 | Detroit Lions | 38-17 | Chicago Bears | 58,764 | Chicago, Illinois |
| 1984 | Nov 18 | Chicago Bears | 16-14 | Detroit Lions | 54,911 | Chicago, Illinois |
| 1984 | Dec 16 | Chicago Bears | 30-13 | Detroit Lions | 53,252 | Pontiac, Michigan |
| 1985 | Nov 10 | Chicago Bears | 24-3 | Detroit Lions | 53,467 | Chicago, Illinois |
| 1985 | Dec 22 | Chicago Bears | 37-17 | Detroit Lions | 74,042 | Pontiac, Michigan |
| 1986 | Oct 26 | Chicago Bears | 13-7 | Detroit Lions | 62,064 | Chicago, Illinois |
| 1986 | Dec 15 | Chicago Bears | 16-13 | Detroit Lions | 75,602 | Pontiac, Michigan |
| 1987 | Nov 22 | Chicago Bears | 30-10 | Detroit Lions | 63,357 | Chicago, Illinois |
| 1988 | Oct 9 | Chicago Bears | 24–7 | Detroit Lions | 64,526 | Pontiac, Michigan |
| 1988 | Dec 11 | Chicago Bears | 13-12 | Detroit Lions | 55,010 | Chicago, Illinois |
| 1989 | Sept 24 | Chicago Bears | 47-27 | Detroit Lions | 71,418 | Pontiac, Michigan |
| 1989 | Dec 10 | Detroit Lions | 27-17 | Chicago Bears | 52,650 | Chicago, Illinois |
Question:
what number of dates were won by the chicago bears?
Answer:
13