| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 213 |
10.8%
|
|
| 2018 | 273 |
13.9%
|
|
| 2019 | 196 |
10%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 1284 |
65.3%
|