| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | No | 309 |
25.8%
|
| 1 | Yes | 870 |
72.5%
|
| 8 | Refused | 4 |
0.3%
|
| 9 | Don't know | 16 |
1.3%
|