| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.4%
|
| 2 | 2 |
0.7%
|
|
| 3 | 8 |
2.8%
|
|
| 4 | 15 |
5.3%
|
|
| 5 | 50 |
17.7%
|
|
| 6 | 51 |
18.1%
|
|
| 7 | 49 |
17.4%
|
|
| 8 | 46 |
16.3%
|
|
| 9 | 25 |
8.9%
|
|
| 10 | Very effective | 32 |
11.3%
|
| 11 | Don't know | 21 | |
| Sysmiss | 93 |