| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.2%
|
|
| 1 | Not effective at all | 18 |
2.9%
|
| 2 | 28 |
4.6%
|
|
| 3 | 29 |
4.7%
|
|
| 4 | 40 |
6.5%
|
|
| 5 | 91 |
14.9%
|
|
| 6 | 74 |
12.1%
|
|
| 7 | 81 |
13.3%
|
|
| 8 | 67 |
11%
|
|
| 9 | 40 |
6.5%
|
|
| 10 | Very effective | 30 |
4.9%
|
| 11 | Don't know | 112 |
18.3%
|
| Sysmiss | 13 |