| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very useful | 366 |
1.7%
|
| 2 | Somewhat useful | 111 |
0.5%
|
| 3 | Not useful | 17 |
0.1%
|
| 8 | Not applicable | 20968 |
97.1%
|
| 9 | Unspecified | 139 |
0.6%
|