| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 7 |
4.8%
|
|
| 3 | 11 |
7.6%
|
|
| 4 | 9 |
6.2%
|
|
| 5 | 14 |
9.7%
|
|
| 6 | 23 |
15.9%
|
|
| 7 | 29 |
20%
|
|
| 8 | 33 |
22.8%
|
|
| 9 | 13 |
9%
|
|
| 10 | Very effective | 5 |
3.4%
|
| -99 | 5 | ||
| 11 | Don't know | 87 | |
| Sysmiss | 23 |