| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
0.6%
|
| 2 | 13 |
2.4%
|
|
| 3 | 45 |
8.4%
|
|
| 4 | 70 |
13%
|
|
| 5 | 89 |
16.6%
|
|
| 6 | 113 |
21%
|
|
| 7 | 95 |
17.7%
|
|
| 8 | 71 |
13.2%
|
|
| 9 | 29 |
5.4%
|
|
| 10 | Very effective | 9 |
1.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 26 |