| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
2.3%
|
| 2 | 3 |
0.9%
|
|
| 3 | 18 |
5.2%
|
|
| 4 | 16 |
4.6%
|
|
| 5 | 31 |
9%
|
|
| 6 | 50 |
14.5%
|
|
| 7 | 58 |
16.8%
|
|
| 8 | 52 |
15%
|
|
| 9 | 31 |
9%
|
|
| 10 | Very effective | 79 |
22.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 159 |