| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 1 | earth | 21870 |
45.5%
|
| 2 | gravel | 6860 |
14.3%
|
| 3 | stone | 1980 |
4.1%
|
| 4 | muram | 1771 |
3.7%
|
| 5 | paved/ tarred | 14231 |
29.6%
|
| 6 | concrete | 1308 |
2.7%
|
| 7 | none of above | 64 |
0.1%
|