| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
2.2%
|
|
| 1 | Not effective at all | 2 |
1.1%
|
| 2 | 1 |
0.6%
|
|
| 3 | 5 |
2.8%
|
|
| 4 | 6 |
3.3%
|
|
| 5 | 13 |
7.2%
|
|
| 6 | 15 |
8.3%
|
|
| 7 | 31 |
17.2%
|
|
| 8 | 37 |
20.6%
|
|
| 9 | 12 |
6.7%
|
|
| 10 | Very effective | 3 |
1.7%
|
| 11 | Don't know | 51 |
28.3%
|
| Sysmiss | 85 |