| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.4%
|
|
| 1 | Not effective at all | 16 |
5.4%
|
| 2 | 12 |
4.1%
|
|
| 3 | 23 |
7.8%
|
|
| 4 | 23 |
7.8%
|
|
| 5 | 34 |
11.5%
|
|
| 6 | 42 |
14.2%
|
|
| 7 | 29 |
9.8%
|
|
| 8 | 28 |
9.5%
|
|
| 9 | 18 |
6.1%
|
|
| 10 | Very effective | 15 |
5.1%
|
| 11 | Don't know | 51 |
17.3%
|
| Sysmiss | 12 |