Year	Percent
1996-01-01	2.6366900000000000
1997-01-01	1.0044000000000000
1998-01-01	1.7414800000000000
1999-01-01	1.9451700000000000
2000-01-01	1.7516300000000000
2001-01-01	1.8330500000000000
2002-01-01	1.7464500000000000
2003-01-01	1.4550500000000000
2004-01-01	1.2255300000000000
2005-01-01	1.5529700000000002
2006-01-01	1.6678500000000000
2007-01-01	1.6491400000000000
2008-01-01	1.8085500000000000
2009-01-01	1.7347200000000000
2010-01-01	1.9601500000000000
2011-01-01	2.0866700000000002
2012-01-01	2.1936700000000000
2013-01-01	2.1461200000000002
2014-01-01	2.1260800000000000
2015-01-01	2.0854100000000000
2016-01-01	2.2513400000000003