| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | |
| 1 | Possible to achieve without much effort | 6 |
2.8%
|
| 2 | Possible to achieve with some effort | 54 |
25.6%
|
| 3 | Possible to achieve with normal amount of effort | 53 |
25.1%
|
| 4 | Possible to achieve with more than normal effort | 67 |
31.8%
|
| 5 | Only possible to achieve with extraordinary effort | 27 |
12.8%
|
| 6 | Targets were not achieved | 4 |
1.9%
|