| Yes, they matter greatly | 38 % |
| Yes, they are slightly effective | 35 % |
| No, they have no real effect | 23 % |
| Uncertain | 5 % |
| Total | 66 |
| Yes, they matter greatly | 38 % |
| Yes, they are slightly effective | 35 % |
| No, they have no real effect | 23 % |
| Uncertain | 5 % |
| Total | 66 |