Year Percent 1995-01-01 0.7831790000000000 1996-01-01 0.6873470000000000 1997-01-01 0.8842160000000000 1998-01-01 0.8873820000000000 1999-01-01 0.7104870000000000 2000-01-01 0.9866850000000000 2001-01-01 1.6921000000000000 2002-01-01 1.2819999999999998 2003-01-01 1.1887700000000000 2004-01-01 1.5350400000000000 2005-01-01 2.2008200000000000 2006-01-01 3.2663000000000000 2007-01-01 2.8896700000000000 2008-01-01 2.9436600000000000 2009-01-01 3.1251000000000000 2010-01-01 3.5705699999999996 2011-01-01 2.8104000000000000 2012-01-01 1.9469599999999998 2013-01-01 1.4993500000000000 2014-01-01 1.1469000000000000 2015-01-01 0.8424780000000001 2016-01-01 0.6736560000000000 2017-01-01 0.1798440000000000