| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Impassable | 0 |
0%
|
| 2 | Very poor | 216 |
18%
|
| 3 | Poor | 336 |
28%
|
| 4 | Fair | 432 |
36%
|
| 5 | Good | 200 |
16.7%
|
| 6 | Very good | 16 |
1.3%
|
| 7 | Not applicable | 0 |
0%
|