| Value | Category | Cases | |
|---|---|---|---|
| 1 | Flat | 707 |
45.1%
|
| 2 | Roughly Conical | 310 |
19.8%
|
| 3 | Gable (triangular cross-section) | 486 |
31%
|
| 4 | None of the above | 65 |
4.1%
|
| Sysmiss | 2985 |