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11 97 11 98 11 99 12 00 12 01 12 02 12 03 12 04 12 05 12 06 12 07 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998

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