| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 6 |
2.1%
|
| 2 | 5 |
1.7%
|
|
| 3 | 11 |
3.8%
|
|
| 4 | 9 |
3.1%
|
|
| 5 | 29 |
10%
|
|
| 6 | 29 |
10%
|
|
| 7 | 54 |
18.6%
|
|
| 8 | 52 |
17.9%
|
|
| 9 | 43 |
14.8%
|
|
| 10 | Very effective | 36 |
12.4%
|
| 11 | Don't know | 16 |
5.5%
|
| Sysmiss | 16 |