| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
3.1%
|
| 2 | 6 |
2.7%
|
|
| 3 | 7 |
3.1%
|
|
| 4 | 13 |
5.8%
|
|
| 5 | 14 |
6.2%
|
|
| 6 | 19 |
8.4%
|
|
| 7 | 30 |
13.3%
|
|
| 8 | 26 |
11.6%
|
|
| 9 | 27 |
12%
|
|
| 10 | Very effective | 76 |
33.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 117 |