| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 488 |
7.8%
|
|
| 2017 | 927 |
14.9%
|
|
| 2018 | 1025 |
16.5%
|
|
| 2019 | 146 |
2.3%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 3631 |
58.3%
|