| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Impassable | 128 |
5.4%
|
| 2 | Very poor | 860 |
36.2%
|
| 3 | Poor | 514 |
21.6%
|
| 4 | Fair | 412 |
17.3%
|
| 5 | Good | 232 |
9.8%
|
| 6 | Very good | 232 |
9.8%
|