| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.8%
|
| 2 | 2 |
1.8%
|
|
| 3 | 4 |
3.7%
|
|
| 4 | 4 |
3.7%
|
|
| 5 | 12 |
11%
|
|
| 6 | 16 |
14.7%
|
|
| 7 | 35 |
32.1%
|
|
| 8 | 25 |
22.9%
|
|
| 9 | 7 |
6.4%
|
|
| 10 | Very effective | 2 |
1.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 185 |