| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
1.9%
|
| 2 | 10 |
3.2%
|
|
| 3 | 23 |
7.3%
|
|
| 4 | 31 |
9.8%
|
|
| 5 | 50 |
15.8%
|
|
| 6 | 41 |
12.9%
|
|
| 7 | 51 |
16.1%
|
|
| 8 | 54 |
17%
|
|
| 9 | 31 |
9.8%
|
|
| 10 | Very effective | 20 |
6.3%
|
| -99 | 62 | ||
| 11 | Don't know | 131 | |
| Sysmiss | 147 |