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37 6 37 7 37 8 37 9 38 0 38 1 38 2 38 3 38 4 38 5 38 6 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid