| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 116 |
4%
|
|
| 2018 | 405 |
13.8%
|
|
| 2019 | 268 |
9.2%
|
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 2135 |
73%
|