| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 3 months | 115 |
24.7%
|
| 2 | 3 - 6 months | 122 |
26.2%
|
| 3 | 6 months or more | 139 |
29.9%
|
| 4 | It is difficult to answer | 89 |
19.1%
|
| 99 | Refused to answer | 0 |
0%
|
| Sysmiss | 27998 |