| Value | Category | Cases | |
|---|---|---|---|
| 1 | Flat | 3108 |
57.2%
|
| 2 | Slight slope | 1686 |
31.1%
|
| 3 | Moderate slope | 447 |
8.2%
|
| 4 | Steep, hilly | 188 |
3.5%
|
| Sysmiss | 84 |