| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 1 | impassable | 1172 |
2.2%
|
| 2 | very poor | 8565 |
16%
|
| 3 | poor | 7933 |
14.8%
|
| 4 | fair | 13150 |
24.6%
|
| 5 | good | 14511 |
27.2%
|
| 6 | very good | 7977 |
14.9%
|
| 7 | none of the above | 136 |
0.3%
|