| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 85 |
2.1%
|
|
| 2016 | 1189 |
29.9%
|
|
| 2017 | 1453 |
36.6%
|
|
| 2018 | 1243 |
31.3%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 34476 |