| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2019 | 13 | 4 | 3 | 5 | 1 | ||||||||
| 2018 | 6 | 2 | 1 | 2 | 1 | ||||||||
| 2017 | 5 | 1 | 1 | 1 | 2 | ||||||||
| 2016 | 12 | 6 | 1 | 1 | 1 | 2 | 1 | ||||||
| 2015 | 22 | 8 | 3 | 6 | 3 | 2 | |||||||
| 2014 | 9 | 3 | 4 | 2 | |||||||||
| 2013 | 59 | 8 | 6 | 10 | 7 | 2 | 6 | 6 | 1 | 2 | 4 | 7 | |
| 2012 | 93 | 9 | 7 | 8 | 5 | 9 | 9 | 10 | 11 | 9 | 10 | 3 | 3 |
| 2011 | 66 | 2 | 6 | 9 | 7 | 7 | 11 | 4 | 6 | 7 | 2 | 5 | |
| 2010 | 54 | 15 | 4 | 7 | 6 | 4 | 5 | 3 | 4 | 4 | 2 | ||
| 2009 | 80 | 11 | 5 | 8 | 6 | 5 | 8 | 6 | 5 | 10 | 6 | 5 | 5 |
| 2008 | 69 | 5 | 8 | 8 | 5 | 1 | 3 | 6 | 10 | 4 | 7 | 6 | 6 |
| 2007 | 62 | 6 | 4 | 3 | 6 | 3 | 8 | 3 | 6 | 6 | 4 | 4 | 9 |
| 2006 | 81 | 15 | 12 | 16 | 12 | 1 | 8 | 7 | 6 | 4 | |||
| 2005 | 141 | 11 | 7 | 9 | 14 | 12 | 12 | 10 | 15 | 11 | 15 | 14 | 11 |
| 2004 | 77 | 3 | 15 | 1 | 2 | 15 | 7 | 13 | 12 | 9 | |||
| 2003 | 79 | 7 | 12 | 3 | 11 | 9 | 9 | 11 | 9 | 8 | |||
| 2002 | 175 | 16 | 12 | 15 | 17 | 17 | 20 | 17 | 9 | 16 | 16 | 10 | 10 |
| 2001 | 167 | 14 | 16 | 16 | 14 | 11 | 13 | 13 | 16 | 11 | 17 | 14 | 12 |
| 2000 | 181 | 17 | 16 | 15 | 15 | 15 | 18 | 17 | 13 | 11 | 18 | 14 | 12 |
| 1999 | 95 | 2 | 2 | 10 | 15 | 12 | 8 | 9 | 6 | 7 | 10 | 14 | |
| 1998 | 8 | 4 | 2 | 2 | |||||||||
| 1554 |