| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 2 |
0.6%
|
|
| 2010 | 23 |
7.5%
|
|
| 2011 | 84 |
27.3%
|
|
| 2012 | 92 |
29.9%
|
|
| 2013 | 72 |
23.4%
|
|
| 2014 | 35 |
11.4%
|
|
| Sysmiss | 2256 |