| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 39 |
1.3%
|
|
| 2017 | 180 |
6.2%
|
|
| 2018 | 202 |
6.9%
|
|
| 2019 | 174 |
5.9%
|
|
| 9999 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 2328 |
79.6%
|