| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 65 |
2.2%
|
|
| 2017 | 383 |
13.1%
|
|
| 2018 | 443 |
15.1%
|
|
| 2019 | 353 |
12.1%
|
|
| 9999 | NO RESPONSE | 7 |
0.2%
|
| Sysmiss | 1674 |
57.2%
|