| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 715 |
11.5%
|
|
| 2017 | 974 |
15.7%
|
|
| 2018 | 1073 |
17.2%
|
|
| 2019 | 140 |
2.2%
|
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 3315 |
53.3%
|