| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1988 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1989 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 1990 | 0 | 0 | 0 | 36 | 0 | 0 | 2 | 5 | 2 | 0 | 4 | 5 |
| 1991 | 16 | 0 | 0 | 4 | 3 | 14 | 1 | 0 | 0 | 2 | 0 | 0 |
| 1993 | 0 | 0 | 0 | 4 | 2 | 0 | 0 | 0 | 5 | 3 | 6 | 2 |
| 1994 | 1 | 7 | 18 | 15 | 1 | 2 | 0 | 0 | 0 | 3 | 6 | 2 |
| 1995 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 3 | 3 | 7 | 0 |
| 1997 | 0 | 0 | 0 | 0 | 5 | 1 | 0 | 0 | 0 | 4 | 1 | 0 |
| 1999 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 2 | 3 | 6 |
| 2000 | 0 | 0 | 5 | 1 | 7 | 12 | 21 | 2 | 4 | 1 | 1 | 0 |
| 2001 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |