| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Annually | 19 |
7.1%
|
| 2 | Biannually/Every six months | 19 |
7.1%
|
| 3 | Quarterly | 34 |
12.7%
|
| 4 | Monthly | 183 |
68.3%
|
| 5 | Weekly | 7 |
2.6%
|
| 6 | Daily | 4 |
1.5%
|
| 7 | Hourly | 1 |
0.4%
|
| 8 | More than once in an hour | 1 |
0.4%
|
| Sysmiss | 93 |