| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 2 |
0.1%
|
| 2 | Weekly | 5 |
0.2%
|
| 3 | Monthly | 5 |
0.2%
|
| 4 | Less than monthly | 143 |
7.1%
|
| 5 | Never | 1871 |
92.3%
|
| Sysmiss | 1769 |