| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.8%
|
|
| 1 | Not effective at all | 4 |
1.4%
|
| 2 | 4 |
1.4%
|
|
| 3 | 8 |
2.9%
|
|
| 4 | 14 |
5.1%
|
|
| 5 | 12 |
4.3%
|
|
| 6 | 29 |
10.5%
|
|
| 7 | 31 |
11.2%
|
|
| 8 | 23 |
8.3%
|
|
| 9 | 11 |
4%
|
|
| 10 | Very effective | 10 |
3.6%
|
| 11 | Don't know | 125 |
45.3%
|
| Sysmiss | 3 |