| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 1 |
2.3%
|
|
| 2009 | 3 |
7%
|
|
| 2010 | 2 |
4.7%
|
|
| 2011 | 3 |
7%
|
|
| 2012 | 1 |
2.3%
|
|
| 2013 | 5 |
11.6%
|
|
| 2014 | 7 |
16.3%
|
|
| 2015 | 20 |
46.5%
|
|
| 2016 | 1 |
2.3%
|
|
| Sysmiss | 189 |