| Value | Category | Cases | |
|---|---|---|---|
| 1 | within the last month | 4 |
9.3%
|
| 2 | within the last six months | 21 |
48.8%
|
| 3 | within the last one year | 14 |
32.6%
|
| 4 | one year ago | 4 |
9.3%
|
| Sysmiss | Don't know | 0 | |
| Sysmiss | Not applicable | 0 | |
| Sysmiss | Others | 0 | |
| Sysmiss | Can't reveal | 0 | |
| Sysmiss | 4160 |