| Value | Category | Cases | |
|---|---|---|---|
| 1 | Tar/Tarmac (Paved) | 44 |
12.8%
|
| 2 | Gravel | 87 |
25.4%
|
| 3 | Dust | 205 |
59.8%
|
| 96 | Other | 7 |
2%
|