| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 9 |
12.2%
|
| -96 | Other | 8 |
10.8%
|
| 1 | Every month | 2 |
2.7%
|
| 2 | Every 3 months | 2 |
2.7%
|
| 3 | Every 6 months | 9 |
12.2%
|
| 4 | Every 12 months | 31 |
41.9%
|
| 5 | One time only | 13 |
17.6%
|
| Sysmiss | 112 |