| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 63 |
2.2%
|
|
| 2017 | 377 |
12.9%
|
|
| 2018 | 450 |
15.4%
|
|
| 2019 | 342 |
11.7%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 1689 |
57.7%
|