| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 473 |
7.6%
|
|
| 2017 | 921 |
14.8%
|
|
| 2018 | 1020 |
16.4%
|
|
| 2019 | 151 |
2.4%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 3652 |
58.7%
|