| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 110 |
2.4%
|
|
| 2013 | 1221 |
26.5%
|
|
| 2014 | 1720 |
37.3%
|
|
| 2015 | 1530 |
33.2%
|
|
| 2016 | 23 |
0.5%
|
|
| 9997 | Inconsistent | 5 |
0.1%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 32560 |