| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.2%
|
| 2 | 7 |
2.1%
|
|
| 3 | 19 |
5.6%
|
|
| 4 | 31 |
9.1%
|
|
| 5 | 56 |
16.5%
|
|
| 6 | 58 |
17.1%
|
|
| 7 | 63 |
18.5%
|
|
| 8 | 55 |
16.2%
|
|
| 9 | 33 |
9.7%
|
|
| 10 | Very effective | 14 |
4.1%
|
| -99 | 56 | ||
| 11 | Don't know | 111 | |
| Sysmiss | 150 |