| Value |
Category |
| 1 |
Wood, timber of wooden boards, Plywood |
| 2 |
Concrete(cement) |
| 3 |
Gravel (kirikiri) |
| 4 |
Earth |
| 5 |
Lime |
| 6 |
Tiles |
| 7 |
Other |
| 9 |
Slabs |
| 10 |
Decking/Concrete |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.