| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 5 |
0.1%
|
| 2 | Weekly | 13 |
0.4%
|
| 3 | Monthly | 57 |
1.6%
|
| 4 | Less than monthly | 135 |
3.8%
|
| 5 | Never | 3304 |
94%
|
| Sysmiss | 2499 |