| Value | Category | Cases | |
|---|---|---|---|
| 1 | flat | 215 |
91.1%
|
| 2 | gentle slope | 14 |
5.9%
|
| 3 | steep slope | 1 |
0.4%
|
| 4 | hilly | 2 |
0.8%
|
| 5 | other. specify: | 4 |
1.7%
|
| Sysmiss | 118 |