| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.1%
|
| 2 | 5 |
1.4%
|
|
| 3 | 14 |
3.8%
|
|
| 4 | 23 |
6.3%
|
|
| 5 | 42 |
11.4%
|
|
| 6 | 66 |
17.9%
|
|
| 7 | 70 |
19%
|
|
| 8 | 61 |
16.6%
|
|
| 9 | 47 |
12.8%
|
|
| 10 | Very effective | 36 |
9.8%
|
| -99 | 66 | ||
| 11 | Don't know | 71 | |
| Sysmiss | 152 |