| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 89 |
2.2%
|
|
| 2016 | 1207 |
30.2%
|
|
| 2017 | 1456 |
36.4%
|
|
| 2018 | 1244 |
31.1%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 34450 |