| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 27 |
10.4%
|
| 2014 | 91 |
35.1%
|
|
| 2015 | 77 |
29.7%
|
|
| 2016 | 63 |
24.3%
|
|
| 4444 | Marked on card | 1 |
0.4%
|
| 9998 | DK | 0 |
0%
|