| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.8%
|
| 2 | 2 |
1.2%
|
|
| 3 | 2 |
1.2%
|
|
| 4 | 4 |
2.4%
|
|
| 5 | 17 |
10.4%
|
|
| 6 | 13 |
7.9%
|
|
| 7 | 28 |
17.1%
|
|
| 8 | 42 |
25.6%
|
|
| 9 | 42 |
25.6%
|
|
| 10 | Very effective | 11 |
6.7%
|
| -99 | 3 | ||
| 11 | Don't know | 23 | |
| Sysmiss | 14 |