| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 1 |
2.1%
|
|
| 2008 | 2 |
4.2%
|
|
| 2009 | 15 |
31.3%
|
|
| 2010 | 11 |
22.9%
|
|
| 2011 | 5 |
10.4%
|
|
| 2012 | 7 |
14.6%
|
|
| 2013 | 5 |
10.4%
|
|
| 2015 | 1 |
2.1%
|
|
| 2016 | 1 |
2.1%
|
|
| Sysmiss | 184 |