| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 4 |
1.4%
|
|
| 3 | 6 |
2%
|
|
| 4 | 24 |
8.1%
|
|
| 5 | 54 |
18.3%
|
|
| 6 | 71 |
24.1%
|
|
| 7 | 52 |
17.6%
|
|
| 8 | 31 |
10.5%
|
|
| 9 | 25 |
8.5%
|
|
| 10 | Very effective | 26 |
8.8%
|
| -99 | 67 | ||
| 11 | Don't know | 138 | |
| Sysmiss | 157 |