| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 22 |
14.1%
|
| -96 | Other | 5 |
3.2%
|
| 1 | Every month | 53 |
34%
|
| 2 | Every 3 months | 31 |
19.9%
|
| 3 | Every 6 months | 16 |
10.3%
|
| 4 | Every 12 months | 28 |
17.9%
|
| 5 | One time only | 1 |
0.6%
|
| Sysmiss | 30 |