Year	Percent
1975-01-01	0.02449900000000000
1976-01-01	0.02448500000000000
1977-01-01	0.15944600000000000
1978-01-01	0.14612900000000000
1979-01-01	0.13751900000000000
1980-01-01	0.15773199999999998
1981-01-01	0.19662300000000000
1982-01-01	0.17016300000000000
1983-01-01	0.16426900000000000
1984-01-01	0.16283499999999998
1985-01-01	0.16117700000000000
1986-01-01	0.14085799999999998
1987-01-01	0.14312000000000000
1988-01-01	0.13536500000000000
1989-01-01	0.13673500000000000
1990-01-01	0.13174800000000000
1991-01-01	0.14296199999999998
1992-01-01	0.14512500000000000
1993-01-01	0.13794700000000001
1994-01-01	0.13395800000000000
1995-01-01	0.15703699999999998
1996-01-01	0.18888800000000000
1997-01-01	0.17905700000000000
1998-01-01	0.19499200000000000
1999-01-01	0.17731500000000000
2000-01-01	0.15786600000000000
2001-01-01	0.16032500000000000
2002-01-01	0.17021700000000000
2003-01-01	0.17123300000000000
2004-01-01	0.17588800000000002
2005-01-01	0.16366800000000000
2006-01-01	0.15309700000000000
2007-01-01	0.15375300000000000
2008-01-01	0.14808400000000000
2009-01-01	0.16333000000000000
2010-01-01	0.15845300000000000
2011-01-01	0.15335700000000000
2012-01-01	0.15023200000000000
2013-01-01	0.15118499999999999
2014-01-01	0.15219100000000002
2015-01-01	0.15748700000000000
2016-01-01	0.15996000000000000
2017-01-01	0.15469600000000000