| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Impassable | 24 |
2%
|
| 2 | Very poor | 272 |
22.7%
|
| 3 | Poor | 152 |
12.7%
|
| 4 | Fair | 248 |
20.7%
|
| 5 | Good | 264 |
22%
|
| 6 | Very good | 240 |
20%
|
| 7 | Not applicable | 0 |
0%
|