| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Impassable | 40 |
3.3%
|
| 2 | Very poor | 216 |
18%
|
| 3 | Poor | 328 |
27.3%
|
| 4 | Fair | 288 |
24%
|
| 5 | Good | 288 |
24%
|
| 6 | Very good | 40 |
3.3%
|