| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
1.2%
|
| 2 | 8 |
1.3%
|
|
| 3 | 17 |
2.8%
|
|
| 4 | 23 |
3.8%
|
|
| 5 | 61 |
10.1%
|
|
| 6 | 56 |
9.2%
|
|
| 7 | 62 |
10.2%
|
|
| 8 | 81 |
13.4%
|
|
| 9 | 45 |
7.4%
|
|
| 10 | Very effective | 32 |
5.3%
|
| 11 | Don't know | 166 |
27.4%
|
| Sysmiss | 48 |
7.9%
|