| Value | Category | Cases | |
|---|---|---|---|
| 0 | never | 148 |
92.5%
|
| 1 | 0-11 months ago | 1 |
0.6%
|
| 2 | 12+ months ago | 10 |
6.3%
|
| 3 | yes, but don't remember when | 1 |
0.6%
|
| 4 | yes, but frequency in last 12 months missing | 0 |
0%
|
| Sysmiss | 2857 |