| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 480 |
7.7%
|
|
| 2017 | 930 |
14.9%
|
|
| 2018 | 1017 |
16.3%
|
|
| 2019 | 148 |
2.4%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 3642 |
58.5%
|