| Value | Category | Cases | |
|---|---|---|---|
| -99 | 18 |
5.9%
|
|
| 1 | Not effective at all | 29 |
9.5%
|
| 2 | 13 |
4.3%
|
|
| 3 | 13 |
4.3%
|
|
| 4 | 13 |
4.3%
|
|
| 5 | 15 |
4.9%
|
|
| 6 | 16 |
5.3%
|
|
| 7 | 15 |
4.9%
|
|
| 8 | 15 |
4.9%
|
|
| 9 | 15 |
4.9%
|
|
| 10 | Very effective | 69 |
22.7%
|
| 11 | Don't know | 15 |
4.9%
|
| 12 | 58 |
19.1%
|
|
| Sysmiss | 71 |