| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
2.2%
|
|
| 1 | Not effective at all | 4 |
1.8%
|
| 2 | 6 |
2.6%
|
|
| 3 | 4 |
1.8%
|
|
| 4 | 14 |
6.2%
|
|
| 5 | 20 |
8.8%
|
|
| 6 | 27 |
11.9%
|
|
| 7 | 25 |
11%
|
|
| 8 | 21 |
9.3%
|
|
| 9 | 15 |
6.6%
|
|
| 10 | Very effective | 14 |
6.2%
|
| 11 | Don't know | 72 |
31.7%
|
| Sysmiss | 10 |