| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Earth | 168 |
14%
|
| 2 | Gravel | 32 |
2.7%
|
| 3 | Stone | 56 |
4.7%
|
| 4 | Muram | 16 |
1.3%
|
| 5 | Paved/ Tarred | 24 |
2%
|
| 6 | Concrete | 903 |
75.3%
|