| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 4 |
| 1999 | 0 | 1 | 2 | 0 | 0 | 0 | 1 | 2 | 0 | 1 | 0 | 1 | 8 |
| 2000 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 8 |
| 2001 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 1 | 3 | 1 | 3 | 1 | 12 |
| 2002 | 2 | 1 | 2 | 1 | 1 | 0 | 2 | 2 | 1 | 0 | 0 | 2 | 14 |
| 2003 | 1 | 2 | 0 | 1 | 4 | 3 | 1 | 2 | 1 | 1 | 1 | 2 | 19 |
| 2004 | 1 | 1 | 2 | 2 | 5 | 4 | 6 | 1 | 3 | 4 | 9 | 8 | 46 |
| 2005 | 7 | 9 | 8 | 8 | 10 | 15 | 8 | 5 | 5 | 4 | 5 | 4 | 88 |
| 2006 | 8 | 5 | 6 | 6 | 6 | 1 | 6 | 6 | 5 | 6 | 5 | 8 | 68 |
| 2007 | 7 | 2 | 3 | 2 | 4 | 5 | 2 | 2 | 2 | 3 | 4 | 2 | 38 |
| 2008 | 3 | 2 | 4 | 9 | 5 | 4 | 4 | 9 | 3 | 5 | 4 | 4 | 56 |
| 2009 | 11 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 16 |
| 2010 | 1 | 2 | 0 | 0 | 2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 8 |
| 2011 | 4 | 2 | 11 | 4 | 1 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 31 |
| 2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 2 |
| 2013 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Total | 46 | 28 | 40 | 34 | 39 | 39 | 37 | 33 | 26 | 28 | 34 | 35 | 419 |