| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 17 |
4.9%
|
| 2 | 22 |
6.4%
|
|
| 3 | 38 |
11%
|
|
| 4 | 59 |
17.1%
|
|
| 5 | 70 |
20.3%
|
|
| 6 | 69 |
20%
|
|
| 7 | 41 |
11.9%
|
|
| 8 | 16 |
4.6%
|
|
| 9 | 1 |
0.3%
|
|
| 10 | Very effective | 12 |
3.5%
|
| 11 | Don't know | 131 | |
| Sysmiss | 2 |