| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within the past year | 142 |
23.9%
|
| 2 | More than 1 year ago | 85 |
14.3%
|
| 3 | Never | 362 |
60.9%
|
| 77 | Don't know | 5 |
0.8%
|
| Sysmiss | 3458 |