| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.5%
|
|
| 1 | Not effective at all | 16 |
4.3%
|
| 2 | 9 |
2.4%
|
|
| 3 | 17 |
4.6%
|
|
| 4 | 12 |
3.3%
|
|
| 5 | 35 |
9.5%
|
|
| 6 | 32 |
8.7%
|
|
| 7 | 32 |
8.7%
|
|
| 8 | 30 |
8.2%
|
|
| 9 | 16 |
4.3%
|
|
| 10 | Very effective | 21 |
5.7%
|
| 11 | Don't know | 146 |
39.7%
|
| Sysmiss | 8 |