| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.1%
|
| 2 | 3 |
3.2%
|
|
| 3 | 2 |
2.1%
|
|
| 4 | 3 |
3.2%
|
|
| 5 | 9 |
9.5%
|
|
| 6 | 8 |
8.4%
|
|
| 7 | 13 |
13.7%
|
|
| 8 | 19 |
20%
|
|
| 9 | 20 |
21.1%
|
|
| 10 | Very effective | 16 |
16.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 237 |