| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Impassable | 56 |
2.3%
|
| 2 | Very poor | 464 |
19.3%
|
| 3 | Poor | 352 |
14.7%
|
| 4 | Fair | 352 |
14.7%
|
| 5 | Good | 736 |
30.7%
|
| 6 | Very good | 440 |
18.3%
|