| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 597 |
9.6%
|
|
| 2017 | 942 |
15.1%
|
|
| 2018 | 1039 |
16.7%
|
|
| 2019 | 134 |
2.2%
|
|
| 9999 | NO RESPONSE | 8 |
0.1%
|
| Sysmiss | 3503 |
56.3%
|