| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 |
0%
|
| -8 | Refused | 0 |
0%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 5 |
35.7%
|
| 1 | Less than 6 months | 2 |
14.3%
|
| 2 | 6 months or more | 7 |
50%
|
| Sysmiss | 985 |