| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.3%
|
| 2 | 1 |
0.2%
|
|
| 3 | 6 |
1%
|
|
| 4 | 12 |
2%
|
|
| 5 | 29 |
4.8%
|
|
| 6 | 27 |
4.5%
|
|
| 7 | 51 |
8.4%
|
|
| 8 | 67 |
11.1%
|
|
| 9 | 45 |
7.4%
|
|
| 10 | Very effective | 32 |
5.3%
|
| 11 | Don't know | 284 |
46.9%
|
| Sysmiss | 50 |
8.3%
|