| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 705 |
11.3%
|
|
| 2017 | 965 |
15.5%
|
|
| 2018 | 1058 |
17%
|
|
| 2019 | 128 |
2.1%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 3361 |
54%
|