Year	Percent
1990-01-01	1.5112400000000000
1991-01-01	1.6751099999999999
1992-01-01	1.6943700000000002
1993-01-01	1.7355200000000002
1994-01-01	1.9256799999999998
1995-01-01	1.9697799999999999
1996-01-01	1.9253200000000001
1997-01-01	1.7948200000000000
1998-01-01	1.8000500000000000
1999-01-01	1.7957800000000000
2000-01-01	1.6731599999999998
2001-01-01	1.6335400000000000
2002-01-01	1.4958799999999999
2003-01-01	1.5027200000000000
2004-01-01	1.3890000000000000
2005-01-01	1.2844700000000000
2006-01-01	1.4312300000000000
2007-01-01	1.5686600000000000
2008-01-01	1.7144099999999998
2009-01-01	1.7278700000000000
2010-01-01	1.8306400000000000
2011-01-01	1.8665100000000000
2012-01-01	1.7158600000000000
2013-01-01	1.6641400000000002
2014-01-01	1.6100400000000000
2015-01-01	1.5535100000000000
2016-01-01	1.3443399999999999