Year Percent 1995-01-01 24.03760000000000 1996-01-01 38.75270000000000 1997-01-01 55.57850000000000 1998-01-01 42.53570000000000 1999-01-01 36.46050000000000 2000-01-01 68.07790000000000 2001-01-01 107.52300000000000 2002-01-01 274.77000000000000 2003-01-01 302.26099999999997 2004-01-01 359.70000000000000 2005-01-01 427.90100000000000 2006-01-01 637.13600000000000 2007-01-01 556.17000000000000 2008-01-01 260.35500000000000 2009-01-01 180.62099999999998 2010-01-01 168.52100000000000 2011-01-01 170.78200000000000 2012-01-01 144.20300000000000 2013-01-01 95.51860000000000