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97 6 97 7 97 8 97 9 98 0 98 1 98 2 98 3 98 4 98 5 98 6 98 7 98 8 98 9 99 0 99 1 99 2 99 3 99 4 99 5 99 6 99 7 99 8 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989

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