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18 44 18 45 18 46 18 47 18 48 18 49 18 50 18 51 18 52 18 53 18 54 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000

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