| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.3%
|
| 2 | 6 |
2%
|
|
| 3 | 13 |
4.3%
|
|
| 4 | 23 |
7.6%
|
|
| 5 | 48 |
15.9%
|
|
| 6 | 48 |
15.9%
|
|
| 7 | 65 |
21.5%
|
|
| 8 | 49 |
16.2%
|
|
| 9 | 28 |
9.3%
|
|
| 10 | Very effective | 18 |
6%
|
| -99 | 64 | ||
| 11 | Don't know | 138 | |
| Sysmiss | 153 |