Year	Percent
1990-01-01	0.3294160000000000
1991-01-01	0.4268560000000000
1992-01-01	0.6640980000000000
1993-01-01	0.8220010000000000
1994-01-01	1.0538700000000000
1995-01-01	1.1235600000000001
1996-01-01	1.0805000000000000
1997-01-01	1.0937700000000001
1998-01-01	1.1657300000000000
1999-01-01	1.3350000000000000
2000-01-01	1.3869300000000000
2001-01-01	1.4476400000000000
2002-01-01	1.2877200000000000
2003-01-01	1.4787800000000000
2004-01-01	1.6964700000000001
2005-01-01	1.8933200000000001
2006-01-01	2.0729100000000000
2007-01-01	2.0855400000000000
2008-01-01	2.0270700000000000
2009-01-01	1.9935800000000000
2010-01-01	1.7175700000000000
2011-01-01	1.5701800000000000
2012-01-01	1.4471700000000000
2013-01-01	1.3454300000000000
2014-01-01	1.3111899999999999
2015-01-01	1.4348000000000000
2016-01-01	1.5048500000000000
2017-01-01	1.4434200000000001