| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2013 | 2 | 2 | |||||||||||
| 2012 | 12 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| 2011 | 2 | 1 | 1 | ||||||||||
| 2010 | 12 | 3 | 2 | 2 | 3 | 1 | 1 | ||||||
| 2009 | 13 | 1 | 1 | 2 | 1 | 2 | 2 | 2 | 2 | ||||
| 2008 | 24 | 2 | 1 | 2 | 4 | 3 | 4 | 1 | 1 | 2 | 1 | 2 | 1 |
| 2007 | 34 | 3 | 3 | 3 | 4 | 4 | 4 | 3 | 4 | 3 | 1 | 2 | |
| 2006 | 30 | 2 | 3 | 4 | 1 | 1 | 3 | 2 | 2 | 5 | 2 | 2 | 3 |
| 2005 | 59 | 3 | 10 | 6 | 9 | 6 | 6 | 8 | 1 | 3 | 2 | 3 | 2 |
| 2004 | 78 | 7 | 5 | 7 | 7 | 6 | 8 | 6 | 4 | 8 | 9 | 6 | 5 |
| 2003 | 72 | 6 | 7 | 8 | 4 | 5 | 4 | 5 | 5 | 4 | 10 | 10 | 4 |
| 2002 | 38 | 2 | 4 | 2 | 3 | 4 | 3 | 1 | 3 | 6 | 5 | 5 | |
| 2001 | 6 | 1 | 1 | 2 | 2 | ||||||||
| 2000 | 13 | 3 | 1 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | |||
| 1999 | 9 | 1 | 2 | 1 | 1 | 2 | 1 | 1 | |||||
| 1998 | 36 | 3 | 3 | 6 | 3 | 1 | 1 | 3 | 3 | 4 | 8 | 1 | |
| 1997 | 11 | 1 | 5 | 3 | 2 | ||||||||
| 451 |
