| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.3%
|
| 2 | 4 |
1.1%
|
|
| 3 | 3 |
0.8%
|
|
| 4 | 21 |
5.6%
|
|
| 5 | 24 |
6.4%
|
|
| 6 | 36 |
9.6%
|
|
| 7 | 55 |
14.7%
|
|
| 8 | 85 |
22.7%
|
|
| 9 | 62 |
16.6%
|
|
| 10 | Very effective | 79 |
21.1%
|
| -99 | 62 | ||
| 11 | Don't know | 71 | |
| Sysmiss | 150 |