| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Annually | 11 |
25.6%
|
| 2 | Biannually/Every six months | 8 |
18.6%
|
| 3 | Quarterly | 7 |
16.3%
|
| 4 | Monthly | 14 |
32.6%
|
| 5 | Weekly | 1 |
2.3%
|
| 6 | Daily | 2 |
4.7%
|
| 7 | Hourly | 0 |
0%
|
| 8 | More than once in an hour | 0 |
0%
|
| Sysmiss | 1053 |