| Value | Category | Cases | |
|---|---|---|---|
| -99 | 13 |
3.4%
|
|
| 1 | Not effective at all | 4 |
1.1%
|
| 2 | 3 |
0.8%
|
|
| 3 | 8 |
2.1%
|
|
| 4 | 12 |
3.2%
|
|
| 5 | 32 |
8.5%
|
|
| 6 | 38 |
10.1%
|
|
| 7 | 52 |
13.8%
|
|
| 8 | 53 |
14.1%
|
|
| 9 | 23 |
6.1%
|
|
| 10 | Very effective | 12 |
3.2%
|
| 11 | Don't know | 127 |
33.7%
|
| Sysmiss | 7 |