| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
4.1%
|
| 2 | 7 |
5.7%
|
|
| 3 | 6 |
4.9%
|
|
| 4 | 2 |
1.6%
|
|
| 5 | 14 |
11.5%
|
|
| 6 | 15 |
12.3%
|
|
| 7 | 21 |
17.2%
|
|
| 8 | 19 |
15.6%
|
|
| 9 | 21 |
17.2%
|
|
| 10 | Very effective | 12 |
9.8%
|
| -99 | 16 | ||
| 11 | Don't know | 91 | |
| Sysmiss | 25 |