AS | HS | SE | ES | Tot | |
At least once a week | 7 | 24 | 27 | 0 | 22 |
At least once every second week | 22 | 22 | 29 | 10 | 25 |
At least once a month | 45 | 35 | 28 | 61 | 34 |
At least once per semester | 20 | 15 | 11 | 29 | 15 |
Less frequently than once a semester | 3 | 3 | 2 | 0 | 3 |
I don’t know | 1 | 0 | 1 | 0 | 1 |