| Value | Category | Cases | |
|---|---|---|---|
| 1 | From last 3 months | 118 |
12.3%
|
| 2 | 4-6 months | 117 |
12.2%
|
| 3 | 7-12 months | 201 |
20.9%
|
| 4 | more than a year | 393 |
40.9%
|
| 7 | Don't know | 131 |
13.6%
|
| Sysmiss | 2639 |