| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1%
|
| 2 | 1 |
1%
|
|
| 3 | 6 |
6.1%
|
|
| 4 | 9 |
9.1%
|
|
| 5 | 11 |
11.1%
|
|
| 6 | 9 |
9.1%
|
|
| 7 | 12 |
12.1%
|
|
| 8 | 21 |
21.2%
|
|
| 9 | 20 |
20.2%
|
|
| 10 | Very effective | 9 |
9.1%
|
| -99 | 13 | ||
| 11 | Don't know | 55 | |
| Sysmiss | 16 |