| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
0.5%
|
|
| 1 | Not effective at all | 5 |
0.8%
|
| 2 | 5 |
0.8%
|
|
| 3 | 16 |
2.6%
|
|
| 4 | 28 |
4.5%
|
|
| 5 | 93 |
15.1%
|
|
| 6 | 94 |
15.3%
|
|
| 7 | 110 |
17.9%
|
|
| 8 | 88 |
14.3%
|
|
| 9 | 61 |
9.9%
|
|
| 10 | Very effective | 38 |
6.2%
|
| 11 | Don't know | 75 |
12.2%
|
| Sysmiss | 8 |