0 0 RESERVED
1 1 LESS THAN 10% OF RUNWAY COVERED
2 2 11% TO 25% OF RUNWAY COVERED
5 5 25% TO 50% OF RUNWAY COVERED
9 9 51% TO 100% OF RUNWAY COVERED
15 15 MISSING OR NOT REPORTED (E.G. DUE TO RUNWAY CLEARANCE IN PROGRESS)
