Year	Percent
1996-01-01	6.0046000000000000
1997-01-01	4.6825800000000010
1998-01-01	5.1238800000000010
1999-01-01	5.9349800000000000
2000-01-01	4.7322500000000000
2001-01-01	6.8158400000000000
2002-01-01	7.8844899999999996
2003-01-01	6.8468000000000000
2004-01-01	8.1218100000000000
2005-01-01	6.4194000000000000
2006-01-01	7.3185800000000000
2007-01-01	7.0048200000000000
2008-01-01	12.3743000000000000
2009-01-01	8.7191000000000000
2010-01-01	7.6651899999999990
2011-01-01	6.9342500000000000
2012-01-01	7.3041300000000010
2013-01-01	7.7505000000000000
2014-01-01	8.1111800000000010
2015-01-01	7.5325300000000000
2016-01-01	8.0111200000000000