| Value | Category | Cases | |
|---|---|---|---|
| 1 | Flat | 11482 |
60.6%
|
| 2 | Gently sloped | 5448 |
28.8%
|
| 3 | Steep | 1409 |
7.4%
|
| 4 | Mixed | 605 |
3.2%
|
| 9 | ns | 0 |
0%
|
| Sysmiss | 224 |