| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1 |
4.3%
|
|
| 2010 | 2 |
8.7%
|
|
| 2011 | 1 |
4.3%
|
|
| 2012 | 1 |
4.3%
|
|
| 2013 | 4 |
17.4%
|
|
| 2014 | 6 |
26.1%
|
|
| 2015 | 8 |
34.8%
|
|
| Sysmiss | 1169 |