| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 10 |
4.7%
|
| 2 | 3 |
1.4%
|
|
| 3 | 6 |
2.8%
|
|
| 4 | 8 |
3.8%
|
|
| 5 | 19 |
8.9%
|
|
| 6 | 20 |
9.4%
|
|
| 7 | 28 |
13.1%
|
|
| 8 | 28 |
13.1%
|
|
| 9 | 25 |
11.7%
|
|
| 10 | Very effective | 66 |
31%
|
| -99 | 9 | ||
| 11 | Don't know | 81 | |
| Sysmiss | 49 |