| Value | Category | Cases | |
|---|---|---|---|
| -99 | 9 |
2.3%
|
|
| 1 | Not effective at all | 9 |
2.3%
|
| 2 | 10 |
2.6%
|
|
| 3 | 15 |
3.8%
|
|
| 4 | 30 |
7.7%
|
|
| 5 | 50 |
12.8%
|
|
| 6 | 30 |
7.7%
|
|
| 7 | 26 |
6.6%
|
|
| 8 | 26 |
6.6%
|
|
| 9 | 19 |
4.9%
|
|
| 10 | Very effective | 12 |
3.1%
|
| 11 | Don't know | 155 |
39.6%
|
| Sysmiss | 16 |