| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 10 |
1.6%
|
| 2 | 7 |
1.1%
|
|
| 3 | 10 |
1.6%
|
|
| 4 | 23 |
3.8%
|
|
| 5 | 74 |
12.1%
|
|
| 6 | 100 |
16.3%
|
|
| 7 | 105 |
17.1%
|
|
| 8 | 100 |
16.3%
|
|
| 9 | 48 |
7.8%
|
|
| 10 | Very effective | 28 |
4.6%
|
| 11 | Don't know | 108 |
17.6%
|
| Sysmiss | 11 |