| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 10 |
0.3%
|
|
| 2016 | 895 |
25.8%
|
|
| 2017 | 1373 |
39.6%
|
|
| 2018 | 1185 |
34.2%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 34983 |