| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 13 |
18.8%
|
| -96 | Other | 6 |
8.7%
|
| 1 | Every month | 6 |
8.7%
|
| 2 | Every 3 months | 0 |
0%
|
| 3 | Every 6 months | 7 |
10.1%
|
| 4 | Every 12 months | 12 |
17.4%
|
| 5 | One time only | 25 |
36.2%
|
| Sysmiss | 117 |