| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
0.2%
|
| -8 | Refused | 0 |
0%
|
| -5 | Not Applicable | 1 |
0.2%
|
| -3 | Missing | 17 |
3.5%
|
| 0 | 470 |
96.1%
|
|
| Sysmiss | 6807 |