| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 3 |
2.1%
|
|
| 3 | 4 |
2.8%
|
|
| 4 | 3 |
2.1%
|
|
| 5 | 12 |
8.4%
|
|
| 6 | 21 |
14.7%
|
|
| 7 | 45 |
31.5%
|
|
| 8 | 33 |
23.1%
|
|
| 9 | 15 |
10.5%
|
|
| 10 | Very effective | 6 |
4.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 151 |