| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 10718 |
98.4%
|
| 1 | A few times last year | 114 |
1%
|
| 2 | About once a month | 44 |
0.4%
|
| 3 | About once a week | 12 |
0.1%
|
| 4 | More than once a week | 2 |
0%
|
| Sysmiss | 26 |