Year Percent 2001-01-01 0.10080499999999999 2002-01-01 0.25550700000000004 2003-01-01 0.64480800000000000 2004-01-01 0.67031400000000010 2005-01-01 0.65484300000000010 2006-01-01 0.84451599999999990 2007-01-01 0.95684099999999990 2008-01-01 1.28016000000000000 2009-01-01 1.66995000000000000 2010-01-01 1.51969000000000000 2011-01-01 1.41335000000000000 2012-01-01 1.22217000000000000