| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
2.2%
|
|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 7 |
3.9%
|
|
| 3 | 2 |
1.1%
|
|
| 4 | 8 |
4.5%
|
|
| 5 | 17 |
9.5%
|
|
| 6 | 19 |
10.6%
|
|
| 7 | 23 |
12.8%
|
|
| 8 | 20 |
11.2%
|
|
| 9 | 9 |
5%
|
|
| 10 | Very effective | 4 |
2.2%
|
| 11 | Don't know | 65 |
36.3%
|
| Sysmiss | 86 |