| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 1 |
0%
|
|
| 2016 | 44 |
1.7%
|
|
| 2017 | 469 |
18.3%
|
|
| 2018 | 2049 |
79.9%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 35883 |