| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 17 |
0.6%
|
| 2 | Weekly | 3 |
0.1%
|
| 3 | Monthly | 5 |
0.2%
|
| 4 | Less than monthly | 38 |
1.4%
|
| 5 | Never | 2611 |
96.7%
|
| 8 | 25 |
0.9%
|
|
| Sysmiss | 1736 |