| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.8%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 7 |
2.5%
|
|
| 3 | 11 |
4%
|
|
| 4 | 11 |
4%
|
|
| 5 | 15 |
5.4%
|
|
| 6 | 15 |
5.4%
|
|
| 7 | 23 |
8.3%
|
|
| 8 | 28 |
10.1%
|
|
| 9 | 17 |
6.1%
|
|
| 10 | Very effective | 9 |
3.2%
|
| 11 | Don't know | 135 |
48.7%
|
| Sysmiss | 2 |