| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 113 |
3.4%
|
| 2 | Daily | 9 |
0.3%
|
| 3 | Weekly | 20 |
0.6%
|
| 4 | Monthly | 107 |
3.2%
|
| 5 | Never | 3092 |
92.5%
|
| Sysmiss | 2925 |