| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.6%
|
| 3 | 1 |
1.6%
|
|
| 4 | 4 |
6.3%
|
|
| 5 | 9 |
14.1%
|
|
| 6 | 4 |
6.3%
|
|
| 7 | 16 |
25%
|
|
| 8 | 9 |
14.1%
|
|
| 9 | 11 |
17.2%
|
|
| 10 | Very effective | 9 |
14.1%
|
| 11 | N/A | 32 | |
| 12 | Don't know | 0 | |
| Sysmiss | 15 |