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29 5 29 6 29 7 29 8 29 9 30 0 30 1 30 2 30 3 30 4 30 5 30 6 30 7 30 8 30 9 31 0 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993

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