| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Impassable | 0 |
0%
|
| 2 | Very poor | 256 |
22.9%
|
| 3 | Poor | 160 |
14.3%
|
| 4 | Fair | 376 |
33.6%
|
| 5 | Good | 160 |
14.3%
|
| 6 | Very good | 160 |
14.3%
|
| 7 | None of above | 8 |
0.7%
|