| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.9%
|
| 2 | 4 |
3.8%
|
|
| 3 | 5 |
4.7%
|
|
| 4 | 3 |
2.8%
|
|
| 5 | 18 |
17%
|
|
| 6 | 19 |
17.9%
|
|
| 7 | 22 |
20.8%
|
|
| 8 | 19 |
17.9%
|
|
| 9 | 11 |
10.4%
|
|
| 10 | Very effective | 4 |
3.8%
|
| -99 | 6 | ||
| 11 | Don't know | 124 | |
| Sysmiss | 24 |