Year Percent 1995-01-01 31.448600000000000 1996-01-01 43.166000000000004 1997-01-01 44.773200000000000 1998-01-01 16.469200000000000 1999-01-01 12.477000000000000 2000-01-01 11.939800000000000 2001-01-01 10.818600000000000 2002-01-01 33.323400000000000 2003-01-01 27.320999999999998 2004-01-01 37.626100000000000 2005-01-01 53.683700000000000 2006-01-01 47.878800000000000 2007-01-01 44.045000000000000 2008-01-01 29.975100000000000 2009-01-01 37.971800000000000 2010-01-01 48.916500000000000 2011-01-01 30.965000000000000 2012-01-01 20.281600000000000 2013-01-01 14.304900000000000 2014-01-01 7.098800000000000 2015-01-01 29.055100000000000 2016-01-01 21.851900000000000