| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.2%
|
| 2 | 5 |
2%
|
|
| 3 | 9 |
3.5%
|
|
| 4 | 17 |
6.7%
|
|
| 5 | 39 |
15.3%
|
|
| 6 | 50 |
19.6%
|
|
| 7 | 37 |
14.5%
|
|
| 8 | 35 |
13.7%
|
|
| 9 | 28 |
11%
|
|
| 10 | Very effective | 32 |
12.5%
|
| 11 | Don't know | 49 | |
| Sysmiss | 92 |