| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 4 |
6.3%
|
|
| 2009 | 11 |
17.5%
|
|
| 2010 | 15 |
23.8%
|
|
| 2011 | 6 |
9.5%
|
|
| 2012 | 6 |
9.5%
|
|
| 2013 | 8 |
12.7%
|
|
| 2014 | 6 |
9.5%
|
|
| 2015 | 5 |
7.9%
|
|
| 2016 | 2 |
3.2%
|
|
| Sysmiss | 169 |