| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -96 | Other | 2 |
1.4%
|
| 1 | One time only | 4 |
2.9%
|
| 2 | Once a month | 9 |
6.5%
|
| 3 | Several times a month | 4 |
2.9%
|
| 4 | Twice a year | 10 |
7.2%
|
| 5 | Ongoing | 109 |
79%
|
| Sysmiss | 72 |