| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2%
|
| 1 | Annually | 6 |
12.2%
|
| 2 | Biannually/Every six months | 2 |
4.1%
|
| 3 | Quarterly | 11 |
22.4%
|
| 4 | Monthly | 17 |
34.7%
|
| 5 | Weekly | 1 |
2%
|
| 6 | Daily | 7 |
14.3%
|
| 7 | Hourly | 4 |
8.2%
|
| 8 | More than once in an hour | 0 |
0%
|
| Sysmiss | 1274 |