| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.1%
|
| 2 | 1 |
0.5%
|
|
| 3 | 4 |
2.2%
|
|
| 4 | 1 |
0.5%
|
|
| 5 | 8 |
4.3%
|
|
| 6 | 21 |
11.4%
|
|
| 7 | 16 |
8.6%
|
|
| 8 | 25 |
13.5%
|
|
| 9 | 6 |
3.2%
|
|
| 10 | Very effective | 6 |
3.2%
|
| 11 | Don't know | 95 |
51.4%
|
| Sysmiss | 18 |