| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 15 |
2.9%
|
| 2 | 9 |
1.7%
|
|
| 3 | 18 |
3.4%
|
|
| 4 | 24 |
4.6%
|
|
| 5 | 54 |
10.3%
|
|
| 6 | 49 |
9.3%
|
|
| 7 | 46 |
8.8%
|
|
| 8 | 76 |
14.5%
|
|
| 9 | 46 |
8.8%
|
|
| 10 | Very effective | 151 |
28.8%
|
| 11 | Don't know | 37 |
7%
|
| Sysmiss | 42 |