| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 20 |
1.7%
|
|
| 2011 | 22 |
1.8%
|
|
| 2013 | 68 |
5.7%
|
|
| 2014 | 476 |
39.8%
|
|
| 2015 | 313 |
26.2%
|
|
| 2016 | 280 |
23.4%
|
|
| 2017 | 17 |
1.4%
|
|
| Sysmiss | 1037 |