| Value | Category | Cases | |
|---|---|---|---|
| 1 | Several times a week | 543 |
17.8%
|
| 2 | Once a week | 467 |
15.3%
|
| 3 | Once a fortnight | 325 |
10.7%
|
| 4 | About once a month | 286 |
9.4%
|
| 5 | Less often | 312 |
10.3%
|
| 6 | 14 |
0.5%
|
|
| -6 | Follow up refusal | 1011 |
33.2%
|
| -2 | No answer | 56 |
1.8%
|
| -1 | Don't know | 29 |
1%
|