Year	Percent
1990-01-01	1.2224100000000000
1991-01-01	1.2089200000000000
1992-01-01	1.7778000000000000
1993-01-01	1.8791900000000001
1994-01-01	1.8378700000000001
1995-01-01	1.8686000000000000
1996-01-01	1.9082200000000000
1997-01-01	1.8162400000000000
1998-01-01	1.7280799999999998
1999-01-01	1.7055300000000000
2000-01-01	1.6557400000000002
2001-01-01	1.6053500000000000
2002-01-01	1.6610800000000000
2003-01-01	1.6332600000000000
2004-01-01	1.6029300000000000
2005-01-01	1.5804300000000000
2006-01-01	1.5605900000000000
2007-01-01	1.4976800000000000
2008-01-01	1.4724400000000000
2009-01-01	1.5258300000000000
2010-01-01	1.4813300000000000
2011-01-01	1.5646900000000000
2012-01-01	1.6018200000000000
2013-01-01	1.6947200000000000
2014-01-01	1.7162500000000000
2015-01-01	1.6265399999999999
2016-01-01	1.5483300000000000