| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2008 | 6 | 1 | 2 | 1 | 2 | ||||||||
| 2007 | 35 | 1 | 2 | 3 | 15 | 2 | 3 | 4 | 3 | 1 | 1 | ||
| 2006 | 37 | 1 | 4 | 18 | 1 | 4 | 5 | 2 | 1 | 1 | |||
| 2005 | 12 | 1 | 2 | 1 | 2 | 2 | 2 | 1 | 1 | ||||
| 2004 | 9 | 1 | 3 | 4 | 1 | ||||||||
| 2003 | 26 | 1 | 1 | 2 | 3 | 5 | 3 | 5 | 3 | 1 | 2 | ||
| 2002 | 31 | 3 | 3 | 1 | 4 | 2 | 2 | 1 | 4 | 11 | |||
| 2001 | 42 | 4 | 1 | 1 | 4 | 1 | 6 | 8 | 6 | 11 | |||
| 2000 | 70 | 10 | 14 | 12 | 5 | 5 | 4 | 9 | 2 | 6 | 3 | ||
| 1999 | 70 | 15 | 10 | 6 | 8 | 1 | 5 | 4 | 6 | 7 | 8 | ||
| 1998 | 74 | 3 | 5 | 5 | 9 | 3 | 7 | 7 | 7 | 7 | 2 | 6 | 13 |
| 1997 | 25 | 1 | 3 | 1 | 6 | 6 | 6 | 2 | |||||
| 1996 | - | ||||||||||||
| 1995 | 7 | 3 | 2 | 2 | |||||||||
| 1994 | 64 | 9 | 3 | 6 | 5 | 6 | 4 | 4 | 4 | 3 | 5 | 8 | 7 |
| 1993 | 74 | 8 | 8 | 9 | 1 | 4 | 8 | 8 | 5 | 6 | 7 | 7 | 3 |
| 1992 | 69 | 3 | 1 | 3 | 4 | 4 | 5 | 11 | 5 | 7 | 15 | 11 | |
| 1991 | 32 | 1 | 4 | 2 | 2 | 2 | 3 | 4 | 9 | 2 | 3 | ||
| 1990 | 8 | 1 | 2 | 3 | 1 | 1 | |||||||
| 1989 | 4 | 1 | 1 | 1 | 1 | ||||||||
| 1988 | 4 | 1 | 1 | 1 | 1 | ||||||||
| 1987 | 16 | 7 | 2 | 3 | 1 | 2 | 1 | ||||||
| 1986 | 6 | 4 | 2 | ||||||||||
| 721 |
