| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Annually | 40 |
29.2%
|
| 2 | Biannually/Every six months | 26 |
19%
|
| 3 | Quarterly | 37 |
27%
|
| 4 | Monthly | 29 |
21.2%
|
| 5 | Weekly | 3 |
2.2%
|
| 6 | Daily | 0 |
0%
|
| 7 | Hourly | 1 |
0.7%
|
| 8 | More than once in an hour | 1 |
0.7%
|
| Sysmiss | 623 |