| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1986 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 |
| 1987 | 8 | 14 | 4 | 2 | 0 | 9 | 3 | 0 | 0 | 21 | 0 | 3 |
| 1988 | 2 | 1 | 2 | 1 | 1 | 4 | 0 | 4 | 13 | 8 | 3 | 5 |
| 1989 | 2 | 0 | 20 | 4 | 6 | 0 | 3 | 2 | 1 | 1 | 1 | 3 |
| 1990 | 1 | 2 | 2 | 0 | 1 | 0 | 0 | 7 | 2 | 0 | 4 | 2 |
| 1991 | 9 | 1 | 0 | 1 | 4 | 2 | 6 | 2 | 6 | 1 | 0 | 4 |
| 1992 | 0 | 2 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
| 1993 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 3 |
| 1996 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |