| Value | Category | Cases | |
|---|---|---|---|
| 0 | never | 132 |
70.6%
|
| 1 | 0-11 months ago | 4 |
2.1%
|
| 2 | 12+ months ago | 48 |
25.7%
|
| 3 | yes, but don't remember when | 3 |
1.6%
|
| 4 | yes, but frequency in last 12 months missing | 0 |
0%
|
| Sysmiss | 14447 |