| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
0.8%
|
| 2 | 10 |
1.7%
|
|
| 3 | 12 |
2%
|
|
| 4 | 20 |
3.3%
|
|
| 5 | 24 |
4%
|
|
| 6 | 30 |
5%
|
|
| 7 | 33 |
5.4%
|
|
| 8 | 50 |
8.3%
|
|
| 9 | 23 |
3.8%
|
|
| 10 | Very effective | 17 |
2.8%
|
| 11 | Don't know | 354 |
58.4%
|
| Sysmiss | 28 |
4.6%
|