| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 91 |
2.3%
|
|
| 2016 | 1199 |
30%
|
|
| 2017 | 1465 |
36.7%
|
|
| 2018 | 1239 |
31%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 34452 |