| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.4%
|
|
| 1 | Not effective at all | 5 |
2.1%
|
| 2 | 4 |
1.7%
|
|
| 3 | 8 |
3.4%
|
|
| 4 | 12 |
5.1%
|
|
| 5 | 23 |
9.7%
|
|
| 6 | 34 |
14.3%
|
|
| 7 | 28 |
11.8%
|
|
| 8 | 26 |
11%
|
|
| 9 | 14 |
5.9%
|
|
| 10 | Very effective | 15 |
6.3%
|
| 11 | Don't know | 67 |
28.3%
|
| Sysmiss | 7 |