| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 |
0%
|
| -8 | Refused | 0 |
0%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 261 |
59.3%
|
| 1 | Less than 6 months | 40 |
9.1%
|
| 2 | 6 months or more | 139 |
31.6%
|
| Sysmiss | 29670 |