| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 42 |
2.1%
|
|
| 2017 | 196 |
10%
|
|
| 2018 | 232 |
11.8%
|
|
| 2019 | 132 |
6.7%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 1364 |
69.3%
|