| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 212 |
59.9%
|
| 1 | 0-11 months ago | 10 |
2.8%
|
| 2 | 12+ months ago | 87 |
24.6%
|
| 3 | Yes, but don't remember when | 44 |
12.4%
|
| 4 | Yes, but frequency in last 12 months missing | 1 |
0.3%
|
| 9 | 6 | ||
| Sysmiss | 30719 |