| Value | Category | Cases | |
|---|---|---|---|
| 1 | Stone | 630 |
36.9%
|
| 2 | Stone and concrete | 417 |
24.4%
|
| 3 | Concrete | 115 |
6.7%
|
| 4 | Concrete Blocks | 263 |
15.4%
|
| 5 | Clayey Blocks | 40 |
2.3%
|
| 6 | Old stone | 230 |
13.5%
|
| 7 | Other | 11 |
0.6%
|
| Sysmiss | 3 |