| Sex | Year | |||||||||||
| 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | Total | |
| Male | 6 | 4 | 7 | 4 | 3 | 6 | 4 | 1 | 2 | 5 | 5 | 47 |
| Female | 3 | 2 | 1 | 1 | 0 | 3 | 1 | 0 | 0 | 3 | 2 | 16 |
| Total | 9 | 6 | 8 | 5 | 3 | 9 | 5 | 1 | 2 | 7 | 2 | 63 |