| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.9%
|
| 2 | 5 |
1.9%
|
|
| 3 | 9 |
3.5%
|
|
| 4 | 17 |
6.6%
|
|
| 5 | 77 |
29.8%
|
|
| 6 | 45 |
17.4%
|
|
| 7 | 32 |
12.4%
|
|
| 8 | 29 |
11.2%
|
|
| 9 | 19 |
7.4%
|
|
| 10 | Very effective | 20 |
7.8%
|
| 11 | Don't know | 49 | |
| Sysmiss | 89 |