| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1986 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 6 | 90 | 53 | 6 |
| 1987 | 10 | 3 | 14 | 29 | 11 | 17 | 2 | 0 | 2 | 3 | 4 | 0 |
| 1988 | 30 | 18 | 3 | 4 | 1 | 17 | 19 | 28 | 60 | 11 | 2 | 15 |
| 1989 | 7 | 8 | 9 | 52 | 25 | 1 | 0 | 10 | 19 | 13 | 1 | 3 |
| 1990 | 0 | 1 | 2 | 1 | 0 | 5 | 0 | 0 | 0 | 1 | 13 | 30 |
| 1991 | 4 | 0 | 2 | 0 | 0 | 3 | 0 | 0 | 14 | 1 | 1 | 0 |
| 1992 | 0 | 0 | 0 | 4 | 1 | 0 | 2 | 0 | 0 | 1 | 0 | 0 |
| 1993 | 0 | 0 | 5 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1994 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 |