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76 9 77 0 77 1 77 2 77 3 77 4 77 5 77 6 77 7 77 8 77 9 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000

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