| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 9 |
2.8%
|
| 2 | 8 |
2.5%
|
|
| 3 | 14 |
4.3%
|
|
| 4 | 25 |
7.7%
|
|
| 5 | 44 |
13.5%
|
|
| 6 | 56 |
17.2%
|
|
| 7 | 56 |
17.2%
|
|
| 8 | 65 |
19.9%
|
|
| 9 | 28 |
8.6%
|
|
| 10 | Very effective | 21 |
6.4%
|
| -99 | 61 | ||
| 11 | Don't know | 112 | |
| Sysmiss | 158 |