Year	Percent
1996-01-01	1.3465200000000002
1997-01-01	1.8669600000000000
1998-01-01	1.5715600000000000
1999-01-01	2.0982000000000000
2000-01-01	2.4289500000000000
2001-01-01	2.8557500000000000
2002-01-01	3.1649400000000000
2003-01-01	3.8243500000000000
2004-01-01	3.2202599999999997
2005-01-01	2.7352300000000000
2006-01-01	2.8219700000000000
2007-01-01	3.0562000000000000
2008-01-01	2.8047400000000002
2009-01-01	2.2972799999999998
2010-01-01	2.4985800000000000
2011-01-01	3.0013400000000003
2012-01-01	2.7984000000000000
2013-01-01	3.8951700000000000
2014-01-01	3.9378400000000000
2015-01-01	3.5293099999999997
2016-01-01	3.4808800000000004