| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 7 |
2.1%
|
|
| 2010 | 89 |
27.1%
|
|
| 2011 | 107 |
32.6%
|
|
| 2012 | 87 |
26.5%
|
|
| 2013 | 33 |
10.1%
|
|
| 2014 | 5 |
1.5%
|
|
| Sysmiss | 2236 |