| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 1 |
0.5%
|
| 2 | Weekly | 1 |
0.5%
|
| 3 | Monthly | 1 |
0.5%
|
| 4 | Less than monthly | 13 |
6.6%
|
| 5 | Never | 181 |
91.9%
|
| Sysmiss | 2521 |