| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.2%
|
| 2 | 1 |
1.2%
|
|
| 3 | 3 |
3.7%
|
|
| 4 | 8 |
9.9%
|
|
| 5 | 10 |
12.3%
|
|
| 6 | 14 |
17.3%
|
|
| 7 | 13 |
16%
|
|
| 8 | 18 |
22.2%
|
|
| 9 | 7 |
8.6%
|
|
| 10 | Very effective | 6 |
7.4%
|
| -99 | 5 | ||
| 11 | Don't know | 49 | |
| Sysmiss | 24 |