| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 5 |
0.3%
|
|
| 2018 | 145 |
7.4%
|
|
| 2019 | 187 |
9.5%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 1629 |
82.8%
|