| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 3 |
2.5%
|
|
| 3 | 5 |
4.1%
|
|
| 4 | 5 |
4.1%
|
|
| 5 | 26 |
21.3%
|
|
| 6 | 17 |
13.9%
|
|
| 7 | 16 |
13.1%
|
|
| 8 | 35 |
28.7%
|
|
| 9 | 11 |
9%
|
|
| 10 | Very effective | 3 |
2.5%
|
| -99 | 7 | ||
| 11 | Don't know | 108 | |
| Sysmiss | 23 |