| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.2%
|
| 2 | 1 |
0.6%
|
|
| 3 | 2 |
1.2%
|
|
| 4 | 3 |
1.8%
|
|
| 5 | 8 |
4.7%
|
|
| 6 | 10 |
5.8%
|
|
| 7 | 30 |
17.5%
|
|
| 8 | 18 |
10.5%
|
|
| 9 | 11 |
6.4%
|
|
| 10 | Very effective | 5 |
2.9%
|
| 11 | Don't know | 81 |
47.4%
|
| Sysmiss | 15 |