| Value | Category | Cases | |
|---|---|---|---|
| -99 | 7 |
2.4%
|
|
| 1 | Not effective at all | 16 |
5.5%
|
| 2 | 13 |
4.4%
|
|
| 3 | 13 |
4.4%
|
|
| 4 | 22 |
7.5%
|
|
| 5 | 31 |
10.6%
|
|
| 6 | 40 |
13.7%
|
|
| 7 | 37 |
12.6%
|
|
| 8 | 36 |
12.3%
|
|
| 9 | 23 |
7.8%
|
|
| 10 | Very effective | 24 |
8.2%
|
| 11 | Don't know | 31 |
10.6%
|
| Sysmiss | 14 |