| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.6%
|
| 2 | 2 |
0.7%
|
|
| 3 | 14 |
4.6%
|
|
| 4 | 30 |
9.8%
|
|
| 5 | 46 |
15%
|
|
| 6 | 41 |
13.4%
|
|
| 7 | 48 |
15.6%
|
|
| 8 | 40 |
13%
|
|
| 9 | 19 |
6.2%
|
|
| 10 | Very effective | 62 |
20.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 198 |