| Value | Category | Cases | |
|---|---|---|---|
| 1 | (1) Not useful at all | 17691 |
3.6%
|
| 2 | (2) | 26830 |
5.5%
|
| 3 | (3) | 55969 |
11.4%
|
| 4 | (4) | 83404 |
17%
|
| 5 | (5) | 119953 |
24.4%
|
| 6 | (6) Very Useful | 188042 |
38.2%
|
| 7 | N/A | 4031 | |
| 8 | Invalid | 1190 | |
| 9 | Miss | 18848 |