| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 13 |
2.1%
|
| 2 | Weekly | 18 |
2.9%
|
| 3 | Monthly | 36 |
5.8%
|
| 4 | Less than monthly | 42 |
6.8%
|
| 5 | Never | 512 |
82.4%
|
| Sysmiss | 641 |