| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 34 |
1.6%
|
|
| 2017 | 88 |
4%
|
|
| 2018 | 211 |
9.6%
|
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1855 |
84.7%
|