| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 10 |
3.4%
|
| 2 | 8 |
2.7%
|
|
| 3 | 24 |
8.2%
|
|
| 4 | 35 |
12%
|
|
| 5 | 44 |
15.1%
|
|
| 6 | 44 |
15.1%
|
|
| 7 | 55 |
18.8%
|
|
| 8 | 31 |
10.6%
|
|
| 9 | 25 |
8.6%
|
|
| 10 | Very effective | 16 |
5.5%
|
| -99 | 70 | ||
| 11 | Don't know | 136 | |
| Sysmiss | 159 |