| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.2%
|
|
| 1 | Not effective at all | 13 |
2.1%
|
| 2 | 20 |
3.3%
|
|
| 3 | 27 |
4.4%
|
|
| 4 | 44 |
7.2%
|
|
| 5 | 77 |
12.7%
|
|
| 6 | 84 |
13.8%
|
|
| 7 | 86 |
14.2%
|
|
| 8 | 80 |
13.2%
|
|
| 9 | 32 |
5.3%
|
|
| 10 | Very effective | 29 |
4.8%
|
| 11 | Don't know | 114 |
18.8%
|
| Sysmiss | 17 |