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22 9 23 0 23 1 23 2 23 3 23 4 23 5 23 6 23 7 23 8 23 9 24 0 24 1 24 2 24 3 24 4 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992

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