| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very useful | 619 |
2.4%
|
| 2 | Somewhat useful | 126 |
0.5%
|
| 3 | Not useful | 29 |
0.1%
|
| 8 | Not applicable | 24703 |
95.8%
|
| 9 | Unspecified | 309 |
1.2%
|