| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2006 | 2 | 1 | 1 | ||||||||||
| 2005 | - | ||||||||||||
| 2004 | 3 | 1 | 1 | 1 | |||||||||
| 2003 | 4 | 1 | 1 | 2 | |||||||||
| 2002 | 13 | 3 | 1 | 6 | 1 | 1 | 1 | ||||||
| 2001 | 7 | 4 | 3 | ||||||||||
| 2000 | 53 | 9 | 12 | 4 | 6 | 1 | 3 | 2 | 1 | 10 | 5 | ||
| 1999 | 103 | 17 | 13 | 11 | 15 | 10 | 6 | 8 | 10 | 6 | 1 | 2 | 4 |
| 1998 | 76 | 8 | 4 | 10 | 12 | 8 | 5 | 5 | 8 | 1 | 7 | 2 | 6 |
| 1997 | 54 | 1 | 3 | 3 | 4 | 5 | 11 | 6 | 10 | 11 | |||
| 1996 | 46 | 3 | 5 | 2 | 4 | 2 | 5 | 9 | 6 | 5 | 4 | 1 | |
| 1995 | 119 | 5 | 11 | 11 | 12 | 7 | 17 | 16 | 10 | 8 | 14 | 7 | 1 |
| 1994 | 167 | 19 | 15 | 17 | 13 | 14 | 10 | 17 | 16 | 14 | 8 | 10 | 14 |
| 1993 | 193 | 25 | 18 | 20 | 14 | 19 | 15 | 12 | 18 | 16 | 14 | 8 | 14 |
| 1992 | 96 | 2 | 11 | 9 | 9 | 5 | 10 | 18 | 9 | 15 | 4 | 4 | |
| 1991 | 73 | 2 | 11 | 3 | 4 | 11 | 1 | 13 | 4 | 15 | 9 | ||
| 1990 | 93 | 1 | 1 | 16 | 14 | 17 | 14 | 11 | 9 | 1 | 6 | 3 | |
| 1989 | 76 | 17 | 8 | 2 | 2 | 12 | 2 | 7 | 7 | 17 | 1 | 1 | |
| 1988 | 139 | 22 | 17 | 11 | 5 | 11 | 9 | 3 | 12 | 20 | 19 | 10 | |
| 1987 | 143 | 1 | 3 | 7 | 18 | 3 | 12 | 26 | 9 | 13 | 20 | 20 | 11 |
| 1986 | 41 | 2 | 7 | 8 | 5 | 7 | 8 | 4 | |||||
| 1501 |
