| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 670 |
3.7%
|
|
| 2017 | 1213 |
6.6%
|
|
| 2018 | 1542 |
8.4%
|
|
| 2019 | 113 |
0.6%
|
|
| 9999 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 14771 |
80.7%
|