| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
3.3%
|
|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 2 |
1.1%
|
|
| 3 | 3 |
1.6%
|
|
| 4 | 2 |
1.1%
|
|
| 5 | 15 |
8.2%
|
|
| 6 | 15 |
8.2%
|
|
| 7 | 19 |
10.4%
|
|
| 8 | 29 |
15.9%
|
|
| 9 | 14 |
7.7%
|
|
| 10 | Very effective | 3 |
1.6%
|
| 11 | Don't know | 73 |
40.1%
|
| Sysmiss | 83 |