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:
| Season | Points per Game | Total Yards per Game | Rushing Yards per Game | Passing Yards per Game | Sacks | Interceptions |
| --- | --- | --- | --- | --- | --- | --- |
| Season | Points per Game | Total Yards per Game | Rushing Yards per Game | Passing Yards per Game | Sacks | Interceptions |
| 1984 | 18.7 | 324.6 | 113.6 | 210.9 | 48 | 19 |
| 1985 | 17.7 | 270.0 | 92.6 | 177.4 | 68 | 24 |
| 1986 | 14.8 | 297.3 | 80.2 | 217.1 | 59 | 31 |
| 1987 | 20.8 | 310.5 | 117.9 | 192.7 | 55 | 20 |
| 1988 | 19 | 317.9 | 109.9 | 207.9 | 52 | 15 |
| 1989 | 15.8 | 291.5 | 96.2 | 195.3 | 39 | 22 |
| 1990 | 13.2 | 262.9 | 91.2 | 171.7 | 30 | 23 |
| 1991 | 18.6 | 287.5 | 107.9 | 179.6 | 34 | 12 |
| 1992 | 22.9 | 315.2 | 125.8 | 189.4 | 25 | 14 |
Question:
How many seasons have a sacks of 39?
Answer:
1.0