| Value | Category | Cases | |
|---|---|---|---|
| -1 | Don't know | 18 |
1.5%
|
| 1 | A great deal | 21 |
1.7%
|
| 2 | Quite a lot | 129 |
10.5%
|
| 3 | Not very much | 416 |
34%
|
| 4 | None at all | 639 |
52.2%
|