| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 10 |
1.7%
|
| 2 | 14 |
2.3%
|
|
| 3 | 21 |
3.5%
|
|
| 4 | 33 |
5.4%
|
|
| 5 | 52 |
8.6%
|
|
| 6 | 53 |
8.7%
|
|
| 7 | 41 |
6.8%
|
|
| 8 | 68 |
11.2%
|
|
| 9 | 36 |
5.9%
|
|
| 10 | Very effective | 32 |
5.3%
|
| 11 | Don't know | 199 |
32.8%
|
| Sysmiss | 47 |
7.8%
|