| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
0.5%
|
|
| 1 | Not effective at all | 16 |
2.6%
|
| 2 | 15 |
2.4%
|
|
| 3 | 28 |
4.5%
|
|
| 4 | 32 |
5.2%
|
|
| 5 | 74 |
12%
|
|
| 6 | 67 |
10.9%
|
|
| 7 | 74 |
12%
|
|
| 8 | 71 |
11.5%
|
|
| 9 | 46 |
7.5%
|
|
| 10 | Very effective | 34 |
5.5%
|
| 11 | Don't know | 156 |
25.3%
|
| Sysmiss | 8 |