| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 2 |
1.5%
|
|
| 3 | 4 |
3%
|
|
| 4 | 6 |
4.5%
|
|
| 5 | 20 |
15%
|
|
| 6 | 11 |
8.3%
|
|
| 7 | 29 |
21.8%
|
|
| 8 | 27 |
20.3%
|
|
| 9 | 27 |
20.3%
|
|
| 10 | Very effective | 6 |
4.5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 242 |