| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -96 | Other | 1 |
0.6%
|
| 1 | One time only | 10 |
6%
|
| 2 | Once a month | 16 |
9.6%
|
| 3 | Several times a month | 5 |
3%
|
| 4 | Twice a year | 19 |
11.4%
|
| 5 | Ongoing | 116 |
69.5%
|
| Sysmiss | 43 |