| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 7 |
18.4%
|
| -96 | Other | 3 |
7.9%
|
| 1 | Every month | 4 |
10.5%
|
| 2 | Every 3 months | 3 |
7.9%
|
| 3 | Every 6 months | 2 |
5.3%
|
| 4 | Every 12 months | 11 |
28.9%
|
| 5 | One time only | 8 |
21.1%
|
| Sysmiss | 148 |