| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.1%
|
| 2 | 6 |
1.3%
|
|
| 3 | 13 |
2.9%
|
|
| 4 | 22 |
4.9%
|
|
| 5 | 30 |
6.7%
|
|
| 6 | 30 |
6.7%
|
|
| 7 | 30 |
6.7%
|
|
| 8 | 49 |
11%
|
|
| 9 | 41 |
9.2%
|
|
| 10 | Very effective | 89 |
20%
|
| 11 | Don't know | 131 |
29.4%
|
| Sysmiss | 121 |