Year Percent 2000-01-01 0.3139730000000000 2001-01-01 0.4443330000000000 2002-01-01 0.7223149999999999 2003-01-01 0.5667010000000000 2004-01-01 0.7296270000000000 2005-01-01 1.0822900000000000 2006-01-01 0.6800360000000000 2007-01-01 0.8707320000000000 2008-01-01 0.8465959999999999 2009-01-01 0.4923170000000000 2010-01-01 0.5194160000000000 2011-01-01 0.5535610000000000 2012-01-01 0.4582330000000000 2013-01-01 0.5168670000000000 2014-01-01 0.4631210000000000 2015-01-01 0.6417290000000000