| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.2%
|
| 2 | 6 |
2.7%
|
|
| 3 | 8 |
3.6%
|
|
| 4 | 7 |
3.1%
|
|
| 5 | 12 |
5.4%
|
|
| 6 | 28 |
12.6%
|
|
| 7 | 37 |
16.6%
|
|
| 8 | 52 |
23.3%
|
|
| 9 | 45 |
20.2%
|
|
| 10 | Very effective | 23 |
10.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 168 |