| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 24 |
1.8%
|
|
| 2014 | 259 |
19.5%
|
|
| 2015 | 231 |
17.4%
|
|
| 2016 | 222 |
16.7%
|
|
| 2017 | 217 |
16.3%
|
|
| 2018 | 188 |
14.1%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 187 |
14.1%
|