| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Annually | 13 |
3.1%
|
| 2 | Biannually/Every six months | 11 |
2.7%
|
| 3 | Quarterly | 51 |
12.3%
|
| 4 | Monthly | 326 |
78.7%
|
| 5 | Weekly | 3 |
0.7%
|
| 6 | Daily | 10 |
2.4%
|
| 7 | Hourly | 0 |
0%
|
| 8 | More than once in an hour | 0 |
0%
|
| Sysmiss | 1032 |