| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 87 |
2.6%
|
| 2 | Daily | 2 |
0.1%
|
| 3 | Weekly | 11 |
0.3%
|
| 4 | Monthly | 52 |
1.6%
|
| 5 | Never | 3184 |
95.4%
|
| Sysmiss | 2930 |