| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
4.6%
|
| 2 | 6 |
4%
|
|
| 3 | 8 |
5.3%
|
|
| 4 | 4 |
2.6%
|
|
| 5 | 16 |
10.6%
|
|
| 6 | 21 |
13.9%
|
|
| 7 | 26 |
17.2%
|
|
| 8 | 25 |
16.6%
|
|
| 9 | 26 |
17.2%
|
|
| 10 | Very effective | 12 |
7.9%
|
| -99 | 16 | ||
| 11 | Don't know | 62 | |
| Sysmiss | 25 |