| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
3.3%
|
|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 5 |
2.8%
|
|
| 3 | 4 |
2.2%
|
|
| 4 | 5 |
2.8%
|
|
| 5 | 15 |
8.3%
|
|
| 6 | 20 |
11%
|
|
| 7 | 21 |
11.6%
|
|
| 8 | 20 |
11%
|
|
| 9 | 8 |
4.4%
|
|
| 10 | Very effective | 4 |
2.2%
|
| 11 | Don't know | 72 |
39.8%
|
| Sysmiss | 84 |