| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 7 |
0.1%
|
| -8 | Refused | 7 |
0.1%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | Yes | 1612 |
22.8%
|
| 2 | No | 5447 |
77%
|