| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 9740 |
77.7%
|
| 1 | Daily | 2511 |
20%
|
| 2 | Weekly | 237 |
1.9%
|
| 3 | Monthly | 37 |
0.3%
|
| 4 | Less than monthly | 11 |
0.1%
|
| 9 | 4 | ||
| Sysmiss | 252 |