| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.2%
|
|
| 1 | Not effective at all | 9 |
1.5%
|
| 2 | 12 |
2%
|
|
| 3 | 15 |
2.5%
|
|
| 4 | 18 |
2.9%
|
|
| 5 | 66 |
10.8%
|
|
| 6 | 100 |
16.4%
|
|
| 7 | 102 |
16.7%
|
|
| 8 | 100 |
16.4%
|
|
| 9 | 56 |
9.2%
|
|
| 10 | Very effective | 39 |
6.4%
|
| 11 | Don't know | 93 |
15.2%
|
| Sysmiss | 13 |