| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 23 |
0.8%
|
|
| 2017 | 327 |
11.2%
|
|
| 2018 | 453 |
15.5%
|
|
| 2019 | 359 |
12.3%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 1759 |
60.1%
|