| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 5 |
0.2%
|
| 2 | Weekly | 16 |
0.6%
|
| 3 | Monthly | 13 |
0.5%
|
| 4 | Less than monthly | 70 |
2.7%
|
| 5 | Never | 2537 |
96.1%
|
| Sysmiss | 1997 |