| Value | Category | Cases | |
|---|---|---|---|
| 1 | (1) Not useful at all | 30507 |
6.2%
|
| 2 | (2) | 35378 |
7.2%
|
| 3 | (3) | 55788 |
11.3%
|
| 4 | (4) | 79770 |
16.2%
|
| 5 | (5) | 108052 |
21.9%
|
| 6 | (6) Very Useful | 183353 |
37.2%
|
| 7 | N/A | 4037 | |
| 8 | Invalid | 1794 | |
| 9 | Miss | 17279 |