| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
0.7%
|
| 2 | 6 |
1.4%
|
|
| 3 | 12 |
2.8%
|
|
| 4 | 7 |
1.6%
|
|
| 5 | 29 |
6.7%
|
|
| 6 | 31 |
7.1%
|
|
| 7 | 48 |
11%
|
|
| 8 | 49 |
11.2%
|
|
| 9 | 36 |
8.3%
|
|
| 10 | Very effective | 89 |
20.4%
|
| 11 | Don't know | 126 |
28.9%
|
| Sysmiss | 131 |