Year	Percent
1990-01-01	1.8344200000000002
1991-01-01	1.9165200000000000
1992-01-01	2.0209099999999998
1993-01-01	2.0846299999999998
1994-01-01	2.0510400000000000
1995-01-01	1.9168100000000000
1996-01-01	2.0226900000000003
1997-01-01	2.0473700000000000
1998-01-01	1.8995600000000000
1999-01-01	1.8388099999999998
2000-01-01	1.9198300000000000
2001-01-01	1.8847400000000000
2002-01-01	1.9520400000000002
2003-01-01	1.9899600000000000
2004-01-01	2.1212800000000000
2005-01-01	1.6000400000000000
2006-01-01	1.5146899999999999
2007-01-01	1.3948900000000000
2008-01-01	1.3669500000000000
2009-01-01	1.4138100000000000
2010-01-01	1.3454100000000000
2011-01-01	1.2777600000000000
2012-01-01	1.2670299999999999
2013-01-01	1.2359400000000000
2014-01-01	1.1346800000000000
2015-01-01	1.1182600000000000
2016-01-01	1.2975800000000000