| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 2 |
0.1%
|
|
| 2010 | 44 |
2.1%
|
|
| 2011 | 533 |
25.6%
|
|
| 2012 | 612 |
29.3%
|
|
| 2013 | 531 |
25.5%
|
|
| 2014 | 363 |
17.4%
|
|
| 2015 | 1 |
0%
|
|
| Sysmiss | 1279 |