| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 111 |
2.7%
|
| 2 | Monthly | 13 |
0.3%
|
| 3 | Once a year | 16 |
0.4%
|
| 4 | Half yearly | 5 |
0.1%
|
| 5 | Daily | 21 |
0.5%
|
| 9 | Other (specify) | 0 | |
| Sysmiss | 3929 |
95.9%
|