| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a year or less | 4 |
3%
|
| 2 | A few times a year | 9 |
6.7%
|
| 3 | About once a month | 15 |
11.1%
|
| 4 | Two or three times a month | 26 |
19.3%
|
| 5 | About once a week or more | 81 |
60%
|
| Sysmiss | 755 |