| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2006 | 3 | 2 | 1 | ||||||||||
| 2005 | 1 | 1 | |||||||||||
| 2004 | 2 | 1 | 1 | ||||||||||
| 2003 | 1 | 1 | |||||||||||
| 2002 | 7 | 2 | 5 | ||||||||||
| 2001 | 19 | 7 | 6 | 6 | |||||||||
| 2000 | 69 | 12 | 14 | 12 | 9 | 3 | 2 | 4 | 3 | 1 | 6 | 3 | |
| 1999 | 31 | 7 | 2 | 8 | 6 | 8 | |||||||
| 1998 | 151 | 11 | 12 | 10 | 21 | 10 | 5 | 12 | 10 | 10 | 18 | 17 | 15 |
| 1997 | 100 | 11 | 4 | 13 | 12 | 1 | 9 | 4 | 9 | 12 | 8 | 9 | 8 |
| 1996 | 150 | 10 | 12 | 14 | 10 | 12 | 17 | 9 | 12 | 18 | 12 | 14 | 10 |
| 1995 | 132 | 17 | 16 | 7 | 18 | 8 | 8 | 16 | 12 | 7 | 7 | 9 | 7 |
| 1994 | 185 | 17 | 18 | 21 | 9 | 9 | 16 | 10 | 20 | 15 | 17 | 19 | 14 |
| 1993 | 141 | 3 | 10 | 21 | 14 | 20 | 15 | 3 | 3 | 5 | 18 | 14 | 15 |
| 1992 | 2 | 1 | 1 | ||||||||||
| 1991 | 205 | 19 | 19 | 18 | 23 | 14 | 17 | 15 | 18 | 15 | 15 | 20 | 12 |
| 1990 | 183 | 20 | 13 | 11 | 13 | 2 | 16 | 20 | 21 | 14 | 19 | 16 | 18 |
| 1989 | 171 | 24 | 7 | 15 | 17 | 7 | 17 | 13 | 15 | 14 | 15 | 13 | 14 |
| 1988 | 196 | 16 | 22 | 20 | 19 | 15 | 12 | 24 | 15 | 11 | 10 | 19 | 13 |
| 1987 | 249 | 16 | 24 | 27 | 28 | 25 | 25 | 29 | 26 | 19 | 11 | 13 | 6 |
| 1986 | 140 | 10 | 8 | 11 | 13 | 17 | 10 | 13 | 14 | 11 | 11 | 10 | 12 |
| 1985 | 20 | 3 | 10 | 7 | |||||||||
| 2158 |