External density
| Period | State | Owner | Amount |
|---|---|---|---|
| Partial | Recorded | Memorandum | 7,150 |
| Typical | Scheduled | Memorandum | 9,700 |
| Commercial | Filed | Infrastructure | 3,125 |
| Major | Held | Inventory | 9,100 |
| Private | Open | Draft | 6,525 |
| Signed | Held | Register | 9,950 |
| Standard | Recorded | Pamphlet | 8,025 |