| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 166 |
4.2%
|
|
| 2016 | 1170 |
29.3%
|
|
| 2017 | 1472 |
36.8%
|
|
| 2018 | 1191 |
29.8%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 34447 |