| Location | Headcount | Percentage | |
| Calyx | Total | 91 | 29.73% |
| Superior | 15 | 16.48% | |
| Average | 18 | 19.78% | |
| Inferior | 44 | 48.35% | |
| Unspecified | 14 | 15.38% | |
| Bassinet | 79 | 25.81% | |
| Ureter | 116 | 37.9% | |
| Coralliform | 20 | 6.5% | |