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95 9 96 0 96 1 96 2 96 3 96 4 96 5 96 6 96 7 96 8 96 9 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990

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