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57 5 57 6 57 7 57 8 57 9 58 0 58 1 58 2 58 3 58 4 58 5 58 6 58 7 58 8 58 9 59 0 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991

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