| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
2.6%
|
|
| 1 | Not effective at all | 3 |
1.3%
|
| 2 | 1 |
0.4%
|
|
| 3 | 8 |
3.5%
|
|
| 4 | 10 |
4.4%
|
|
| 5 | 23 |
10%
|
|
| 6 | 26 |
11.4%
|
|
| 7 | 21 |
9.2%
|
|
| 8 | 15 |
6.6%
|
|
| 9 | 10 |
4.4%
|
|
| 10 | Very effective | 9 |
3.9%
|
| 11 | Don't know | 97 |
42.4%
|
| Sysmiss | 8 |