| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 791 |
12.7%
|
|
| 2017 | 976 |
15.7%
|
|
| 2018 | 1061 |
17%
|
|
| 2019 | 127 |
2%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 3262 |
52.4%
|