| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
1%
|
| 2 | 12 |
2%
|
|
| 3 | 15 |
2.5%
|
|
| 4 | 24 |
4%
|
|
| 5 | 45 |
7.4%
|
|
| 6 | 31 |
5.1%
|
|
| 7 | 40 |
6.6%
|
|
| 8 | 64 |
10.6%
|
|
| 9 | 26 |
4.3%
|
|
| 10 | Very effective | 28 |
4.6%
|
| 11 | Don't know | 266 |
43.9%
|
| Sysmiss | 49 |
8.1%
|