| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 15 |
40.5%
|
| -96 | Other | 1 |
2.7%
|
| 1 | Every month | 3 |
8.1%
|
| 2 | Every 3 months | 1 |
2.7%
|
| 3 | Every 6 months | 2 |
5.4%
|
| 4 | Every 12 months | 8 |
21.6%
|
| 5 | One time only | 7 |
18.9%
|
| Sysmiss | 149 |