Year	Percent
1996-01-01	4.3296400000000000
1997-01-01	4.6190700000000000
1998-01-01	5.0282599999999995
1999-01-01	5.7033900000000000
2000-01-01	5.1929200000000000
2001-01-01	4.6910400000000000
2002-01-01	4.5023700000000000
2003-01-01	4.4608600000000000
2004-01-01	4.6546600000000000
2005-01-01	5.3413200000000000
2006-01-01	5.2629500000000000
2007-01-01	5.0477600000000000
2008-01-01	3.6765100000000000
2009-01-01	3.5366600000000000
2010-01-01	3.7169300000000005
2011-01-01	3.5031800000000004
2012-01-01	4.0103500000000000
2013-01-01	3.8334800000000000
2014-01-01	3.8489600000000000
2015-01-01	2.9157300000000000
2016-01-01	3.3041900000000000