| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
2.5%
|
|
| 1 | Not effective at all | 4 |
2.5%
|
| 2 | 5 |
3.2%
|
|
| 3 | 4 |
2.5%
|
|
| 4 | 5 |
3.2%
|
|
| 5 | 10 |
6.3%
|
|
| 6 | 18 |
11.4%
|
|
| 7 | 23 |
14.6%
|
|
| 8 | 19 |
12%
|
|
| 9 | 20 |
12.7%
|
|
| 10 | Very effective | 11 |
7%
|
| 11 | Don't know | 35 |
22.2%
|
| Sysmiss | 9 |