| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 1 |
0.1%
|
| 2 | Weekly | 7 |
0.4%
|
| 3 | Monthly | 10 |
0.6%
|
| 4 | Less than monthly | 48 |
2.8%
|
| 5 | Never | 1657 |
96.2%
|
| Sysmiss | 1013 |