| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.5%
|
| 2 | 12 |
3.6%
|
|
| 3 | 14 |
4.2%
|
|
| 4 | 28 |
8.5%
|
|
| 5 | 53 |
16.1%
|
|
| 6 | 55 |
16.7%
|
|
| 7 | 61 |
18.5%
|
|
| 8 | 51 |
15.5%
|
|
| 9 | 28 |
8.5%
|
|
| 10 | Very effective | 23 |
7%
|
| -99 | 43 | ||
| 11 | Don't know | 147 | |
| Sysmiss | 137 |