| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 1 |
0.1%
|
|
| 2011 | 2 |
0.2%
|
|
| 2012 | 20 |
1.8%
|
|
| 2013 | 834 |
74.6%
|
|
| 2014 | 261 |
23.3%
|
|
| Sysmiss | 477 |