| Value | Category | Cases | |
|---|---|---|---|
| 1 | Flat | 197 |
25.5%
|
| 2 | Roughly Conical | 275 |
35.6%
|
| 3 | Gable (triangular cross-section) | 210 |
27.2%
|
| 4 | None of the above | 91 |
11.8%
|
| Sysmiss | 2839 |