| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Earth | 1200 |
50%
|
| 2 | Gravel | 24 |
1%
|
| 3 | Stone | 88 |
3.7%
|
| 4 | Muram | 160 |
6.7%
|
| 5 | Paved/ Tarred | 808 |
33.7%
|
| 6 | Concrete | 24 |
1%
|
| 7 | None of above | 96 |
4%
|