| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Impassable | 0 |
0%
|
| 2 | Very poor | 256 |
21.3%
|
| 3 | Poor | 312 |
26%
|
| 4 | Fair | 392 |
32.7%
|
| 5 | Good | 176 |
14.7%
|
| 6 | Very good | 64 |
5.3%
|
| 7 | Not applicable | 0 |
0%
|