| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.3%
|
|
| 1 | Average slope of 0-2% | 123 |
39.9%
|
| 2 | 2-4% | 54 |
17.5%
|
| 3 | 4-8% | 83 |
26.9%
|
| 4 | 8-16% | 35 |
11.4%
|
| 5 | 16-30% | 10 |
3.2%
|
| 6 | 30-45% | 2 |
0.6%
|
| 7 | >=45% | 0 |
0%
|