| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.2%
|
|
| 1 | Not effective at all | 20 |
3.3%
|
| 2 | 26 |
4.2%
|
|
| 3 | 18 |
2.9%
|
|
| 4 | 33 |
5.4%
|
|
| 5 | 75 |
12.2%
|
|
| 6 | 67 |
10.9%
|
|
| 7 | 72 |
11.7%
|
|
| 8 | 85 |
13.9%
|
|
| 9 | 34 |
5.5%
|
|
| 10 | Very effective | 21 |
3.4%
|
| 11 | Don't know | 161 |
26.3%
|
| Sysmiss | 11 |