| Value | Category | Cases | |
|---|---|---|---|
| 1 | Wood | 123 |
12.5%
|
| 2 | Logs | 15 |
1.5%
|
| 3 | Plastic | 19 |
1.9%
|
| 4 | Concrete | 733 |
74.7%
|
| 5 | Other | 4 |
0.4%
|
| 6 | Don't know | 0 |
0%
|
| 7 | None | 87 |
8.9%
|