| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 9 |
3.1%
|
| 2 | 18 |
6.1%
|
|
| 3 | 19 |
6.5%
|
|
| 4 | 17 |
5.8%
|
|
| 5 | 41 |
13.9%
|
|
| 6 | 36 |
12.2%
|
|
| 7 | 27 |
9.2%
|
|
| 8 | 13 |
4.4%
|
|
| 9 | 7 |
2.4%
|
|
| 10 | Very effective | 5 |
1.7%
|
| 11 | Don't know | 101 |
34.4%
|
| Sysmiss | 7 |