| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.6%
|
| 2 | 4 |
1.2%
|
|
| 3 | 15 |
4.3%
|
|
| 4 | 23 |
6.6%
|
|
| 5 | 46 |
13.3%
|
|
| 6 | 47 |
13.6%
|
|
| 7 | 74 |
21.4%
|
|
| 8 | 59 |
17.1%
|
|
| 9 | 45 |
13%
|
|
| 10 | Very effective | 31 |
9%
|
| -99 | 66 | ||
| 11 | Don't know | 90 | |
| Sysmiss | 155 |