| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.1%
|
|
| 1 | Not effective at all | 3 |
1.1%
|
| 2 | 11 |
4.1%
|
|
| 3 | 17 |
6.3%
|
|
| 4 | 37 |
13.8%
|
|
| 5 | 30 |
11.2%
|
|
| 6 | 31 |
11.6%
|
|
| 7 | 30 |
11.2%
|
|
| 8 | 30 |
11.2%
|
|
| 9 | 7 |
2.6%
|
|
| 10 | Very effective | 17 |
6.3%
|
| 11 | Don't know | 52 |
19.4%
|
| Sysmiss | 3 |