| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2017 | 8 | 1 | 1 | 1 | 3 | 2 | |||||||
| 2016 | 6 | 1 | 1 | 1 | 1 | 2 | |||||||
| 2015 | 11 | 4 | 1 | 4 | 1 | 1 | |||||||
| 2014 | 14 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 3 | 1 | 2 | ||
| 2013 | 1 | 1 | |||||||||||
| 2012 | 10 | 1 | 1 | 3 | 3 | 1 | 1 | ||||||
| 2011 | 7 | 3 | 1 | 1 | 2 | ||||||||
| 2010 | 10 | 1 | 3 | 1 | 1 | 3 | 1 | ||||||
| 2009 | 9 | 1 | 1 | 2 | 1 | 4 | |||||||
| 2008 | 6 | 2 | 1 | 1 | 2 | ||||||||
| 2007 | 12 | 1 | 1 | 5 | 4 | 1 | |||||||
| 2006 | 8 | 2 | 2 | 1 | 1 | 1 | 1 | ||||||
| 2005 | 9 | 2 | 1 | 1 | 3 | 2 | |||||||
| 2004 | 27 | 5 | 2 | 1 | 5 | 5 | 4 | 1 | 1 | 2 | 1 | ||
| 2003 | 30 | 1 | 4 | 2 | 3 | 3 | 1 | 1 | 5 | 3 | 6 | 1 | |
| 2002 | 30 | 4 | 2 | 4 | 2 | 3 | 4 | 1 | 2 | 5 | 2 | 1 | |
| 2001 | 63 | 10 | 7 | 10 | 12 | 6 | 2 | 2 | 2 | 1 | 5 | 6 | |
| 2000 | 157 | 17 | 17 | 15 | 1 | 16 | 17 | 14 | 9 | 14 | 16 | 12 | 9 |
| 1999 | 82 | 8 | 10 | 10 | 6 | 15 | 2 | 5 | 14 | 12 | |||
| 1998 | 136 | 12 | 14 | 16 | 7 | 7 | 14 | 9 | 9 | 12 | 15 | 15 | 6 |
| 1997 | 66 | 5 | 1 | 2 | 2 | 1 | 7 | 9 | 5 | 8 | 10 | 8 | 8 |
| 1996 | 90 | 9 | 11 | 5 | 9 | 6 | 7 | 6 | 9 | 11 | 11 | 2 | 4 |
| 1995 | 59 | 6 | 4 | 4 | 5 | 8 | 6 | 3 | 3 | 4 | 8 | 5 | 3 |
| 1994 | 116 | 15 | 8 | 14 | 8 | 11 | 6 | 9 | 8 | 4 | 11 | 14 | 8 |
| 1993 | 143 | 8 | 6 | 15 | 13 | 13 | 9 | 15 | 14 | 6 | 13 | 15 | 16 |
| 1992 | 67 | 7 | 6 | 11 | 4 | 5 | 5 | 6 | 5 | 3 | 4 | 7 | 4 |
| 1991 | 23 | 4 | 2 | 2 | 2 | 1 | 3 | 1 | 2 | 2 | 1 | 3 | |
| 1990 | 5 | 1 | 3 | 1 | |||||||||
| 1205 |
