| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 7 |
0.1%
|
| -8 | Refused | 3 |
0%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | Yes | 6770 |
95.7%
|
| 2 | No | 293 |
4.1%
|