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45 5 45 6 45 7 45 8 45 9 46 0 46 1 46 2 46 3 46 4 46 5 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990

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