| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 24 |
0.8%
|
|
| 2017 | 302 |
10.3%
|
|
| 2018 | 400 |
13.7%
|
|
| 2019 | 330 |
11.3%
|
|
| 9999 | NO RESPONSE | 3 |
0.1%
|
| Sysmiss | 1866 |
63.8%
|