| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 411 |
6.4%
|
|
| 2018 | 1053 |
16.5%
|
|
| 2019 | 1122 |
17.5%
|
|
| 2020 | 5 |
0.1%
|
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 3799 |
59.4%
|