| Value | Category | Cases | |
|---|---|---|---|
| 1 | FLAT BOTTOM | 2176 |
51.2%
|
| 2 | FLAT TOP | 502 |
11.8%
|
| 3 | SLIGHTLY SLOPED | 1414 |
33.3%
|
| 4 | VERY STEEP | 159 |
3.7%
|
| Sysmiss | 875 |