| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 7 |
0.3%
|
| 2 | Weekly | 21 |
0.8%
|
| 3 | Monthly | 21 |
0.8%
|
| 4 | Less than monthly | 117 |
4.3%
|
| 5 | Never | 2507 |
92.9%
|
| 8 | 22 |
0.8%
|
|
| 9 | 4 |
0.1%
|
|
| Sysmiss | 1736 |