| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 6 |
1.3%
|
|
| 2009 | 22 |
4.6%
|
|
| 2010 | 66 |
13.9%
|
|
| 2011 | 92 |
19.3%
|
|
| 2012 | 195 |
41%
|
|
| 2013 | 95 |
20%
|
|
| Sysmiss | 14402 |