| Value |
Category |
| 1 |
Parallel to the ground |
| 2 |
slope down towards the back side |
| 3 |
slope down towards the front door (*) |
| 4 |
slope at both sides from center |
| 5 |
Flat |
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.