| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 665 |
3.6%
|
|
| 2017 | 1209 |
6.6%
|
|
| 2018 | 1528 |
8.3%
|
|
| 2019 | 109 |
0.6%
|
|
| 9999 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 14798 |
80.8%
|