| Value | Category | Cases | |
|---|---|---|---|
| 1 | Flat | 193 |
51.5%
|
| 2 | Roughly Conical | 78 |
20.8%
|
| 3 | Gable (triangular cross-section) | 95 |
25.3%
|
| 4 | None of the above | 9 |
2.4%
|
| Sysmiss | 3528 |