| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not in past 12 months | 8 |
0.6%
|
| 2 | Once | 21 |
1.7%
|
| 3 | Sometimes | 127 |
10.2%
|
| 4 | Often | 102 |
8.2%
|
| Sysmiss | 982 |
79.2%
|