| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.4%
|
| 2 | 15 |
2.9%
|
|
| 3 | 50 |
9.7%
|
|
| 4 | 66 |
12.8%
|
|
| 5 | 103 |
20%
|
|
| 6 | 90 |
17.5%
|
|
| 7 | 83 |
16.1%
|
|
| 8 | 68 |
13.2%
|
|
| 9 | 27 |
5.3%
|
|
| 10 | Very effective | 10 |
1.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 49 |