| Value | Category | Cases | |
|---|---|---|---|
| 1 | Flat | 1321 |
45.6%
|
| 2 | Slight slope | 1084 |
37.4%
|
| 3 | Moderate slope | 386 |
13.3%
|
| 4 | Steep slope | 108 |
3.7%
|
| Sysmiss | 315 |