| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 16 |
5.4%
|
| 2 | 7 |
2.3%
|
|
| 3 | 11 |
3.7%
|
|
| 4 | 25 |
8.4%
|
|
| 5 | 32 |
10.7%
|
|
| 6 | 38 |
12.7%
|
|
| 7 | 31 |
10.4%
|
|
| 8 | 22 |
7.4%
|
|
| 9 | 13 |
4.3%
|
|
| 10 | Very effective | 13 |
4.3%
|
| 11 | Don't know | 90 |
30.1%
|
| Sysmiss | 8 |