| Value | Category | Cases | |
|---|---|---|---|
| 0 | never | 122 |
76.3%
|
| 1 | 0-11 months ago | 5 |
3.1%
|
| 2 | 12+ months ago | 30 |
18.8%
|
| 3 | yes, but don't remember when | 3 |
1.9%
|
| 4 | yes, but frequency in last 12 months missing | 0 |
0%
|
| Sysmiss | 2857 |