| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 211 |
10.7%
|
|
| 2018 | 276 |
14%
|
|
| 2019 | 198 |
10.1%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 1281 |
65.1%
|