Year	Percent
1996-01-01	2.5594600000000000
1997-01-01	2.3564700000000003
1998-01-01	2.4084300000000000
1999-01-01	2.7977000000000000
2000-01-01	2.4522800000000000
2001-01-01	2.6464500000000000
2002-01-01	2.9642400000000000
2003-01-01	2.9321300000000000
2004-01-01	3.0575300000000000
2005-01-01	2.8297300000000000
2006-01-01	3.0430599999999997
2007-01-01	2.9203400000000000
2008-01-01	3.0790300000000000
2009-01-01	2.9749700000000000
2010-01-01	3.0557000000000000
2011-01-01	2.4006100000000000
2012-01-01	2.1907600000000000
2013-01-01	2.1338100000000000
2014-01-01	2.2166799999999998
2015-01-01	2.4692400000000000
2016-01-01	2.3047299999999997