| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 608 |
9.8%
|
|
| 2017 | 961 |
15.4%
|
|
| 2018 | 1060 |
17%
|
|
| 2019 | 138 |
2.2%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 3450 |
55.4%
|