| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.8%
|
| 2 | 5 |
1.9%
|
|
| 3 | 13 |
5%
|
|
| 4 | 26 |
10%
|
|
| 5 | 48 |
18.5%
|
|
| 6 | 57 |
22%
|
|
| 7 | 52 |
20.1%
|
|
| 8 | 29 |
11.2%
|
|
| 9 | 18 |
6.9%
|
|
| 10 | Very effective | 9 |
3.5%
|
| -99 | 2 | ||
| 11 | Don't know | 105 | |
| Sysmiss | 55 |