| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.3%
|
| 2 | 1 |
1.3%
|
|
| 3 | 2 |
2.6%
|
|
| 4 | 5 |
6.4%
|
|
| 5 | 9 |
11.5%
|
|
| 6 | 15 |
19.2%
|
|
| 7 | 20 |
25.6%
|
|
| 8 | 19 |
24.4%
|
|
| 9 | 6 |
7.7%
|
|
| 10 | Very effective | 0 |
0%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 69 |