| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1 |
0.6%
|
|
| 2010 | 8 |
5%
|
|
| 2011 | 49 |
30.6%
|
|
| 2012 | 53 |
33.1%
|
|
| 2013 | 33 |
20.6%
|
|
| 2014 | 16 |
10%
|
|
| Sysmiss | 2404 |