| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 5 |
1.6%
|
|
| 3 | 12 |
3.9%
|
|
| 4 | 27 |
8.8%
|
|
| 5 | 41 |
13.4%
|
|
| 6 | 23 |
7.5%
|
|
| 7 | 28 |
9.2%
|
|
| 8 | 32 |
10.5%
|
|
| 9 | 11 |
3.6%
|
|
| 10 | Very effective | 2 |
0.7%
|
| 11 | Don't know | 123 |
40.2%
|
| Sysmiss | 62 |