| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, less than month | 55 |
12.9%
|
| 2 | Yes, for a month | 86 |
20.2%
|
| 3 | Yes, for 2-3 months | 236 |
55.5%
|
| 4 | Never did | 48 |
11.3%
|
| Sysmiss | 11897 |