| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 9 |
4.3%
|
|
| 3 | 7 |
3.4%
|
|
| 4 | 9 |
4.3%
|
|
| 5 | 21 |
10.1%
|
|
| 6 | 30 |
14.5%
|
|
| 7 | 47 |
22.7%
|
|
| 8 | 46 |
22.2%
|
|
| 9 | 22 |
10.6%
|
|
| 10 | Very effective | 13 |
6.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 233 |