| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a year or less | 1 |
2.8%
|
| 2 | A few times a year | 2 |
5.6%
|
| 3 | About once a month | 1 |
2.8%
|
| 4 | Two or three times a month | 6 |
16.7%
|
| 5 | About once a week or more | 26 |
72.2%
|
| Sysmiss | 854 |