| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 10 |
0.7%
|
|
| 2017 | 257 |
18.7%
|
|
| 2018 | 216 |
15.7%
|
|
| 2019 | 212 |
15.4%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 682 |
49.5%
|