| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within the last month | 196 |
26.6%
|
| 2 | Within the last year | 106 |
14.4%
|
| 3 | More than 1 year ago | 169 |
22.9%
|
| 4 | I have never done this | 267 |
36.2%
|
| Sysmiss | 700 |