| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.4%
|
| 2 | 2 | 3 |
2.4%
|
| 3 | 3 | 16 |
12.6%
|
| 4 | 4 | 9 |
7.1%
|
| 5 | 5 | 13 |
10.2%
|
| 6 | 6 | 2 |
1.6%
|
| 7 | 7 | 3 |
2.4%
|
| 8 | 8 | 2 |
1.6%
|
| 9 | 9 | 6 |
4.7%
|
| 10 | Very effective | 0 |
0%
|
| 11 | Don't know | 70 |
55.1%
|
| Sysmiss | 19 |