| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1989 | 0 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| 1990 | 1 | 2 | 4 | 2 | 37 | 2 | 0 | 1 | 0 | 13 | 3 | 22 |
| 1991 | 50 | 4 | 4 | 2 | 3 | 19 | 85 | 16 | 43 | 20 | 2 | 0 |
| 1992 | 0 | 13 | 0 | 2 | 17 | 7 | 22 | 1 | 0 | 1 | 1 | 0 |
| 1993 | 0 | 4 | 5 | 6 | 4 | 11 | 2 | 1 | 5 | 6 | 13 | 5 |
| 1994 | 3 | 5 | 9 | 19 | 7 | 18 | 1 | 9 | 7 | 23 | 12 | 8 |
| 1995 | 6 | 14 | 8 | 0 | 9 | 12 | 4 | 18 | 6 | 6 | 1 | 6 |
| 1996 | 7 | 0 | 2 | 8 | 8 | 7 | 5 | 39 | 27 | 1 | 0 | 6 |
| 1997 | 8 | 4 | 4 | 13 | 20 | 17 | 12 | 0 | 15 | 2 | 15 | 18 |
| 1998 | 20 | 1 | 6 | 3 | 0 | 5 | 9 | 0 | 0 | 0 | 0 | 1 |
| 1999 | 31 | 17 | 0 | 14 | 7 | 2 | 8 | 0 | 0 | 7 | 1 | 11 |
| 2000 | 17 | 28 | 7 | 3 | 0 | 29 | 34 | 28 | 11 | 7 | 4 | 0 |
| 2001 | 0 | 0 | 10 | 0 | 0 | 6 | 5 | 24 | 6 | 29 | 30 | 1 |
| 2002 | 3 | 9 | 13 | 0 | 0 | 9 | 4 | 0 | 2 | 0 | 0 | 0 |
| 2003 | 1 | 0 | 0 | 3 | 0 | 1 | 5 | 6 | 4 | 0 | 0 | 0 |
| 2004 | 3 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 10 | 29 | 0 | 9 |
| 2005 | 0 | 15 | 4 | 6 | 4 | 5 | 12 | 31 | 9 | 0 | 7 | 2 |
| 2006 | 8 | 3 | 5 | 3 | 1 | 0 | 3 | 10 | 30 | 6 | 0 | 1 |
| 2007 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
| 2011 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 |