| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 78 |
5%
|
|
| 2017 | 228 |
14.6%
|
|
| 2018 | 260 |
16.6%
|
|
| 2019 | 9 |
0.6%
|
|
| 9999 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 987 |
63.1%
|