| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1 |
0.1%
|
|
| 2010 | 3 |
0.2%
|
|
| 2011 | 5 |
0.4%
|
|
| 2012 | 231 |
18.4%
|
|
| 2013 | 660 |
52.6%
|
|
| 2014 | 355 |
28.3%
|
|
| Sysmiss | 1309 |