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17 74 17 75 17 76 17 77 17 78 17 79 17 80 17 81 17 82 17 83 17 84 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999

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