Year	Percent
1977-01-01	0.0095880000000000000
1978-01-01	0.0093360000000000000
1979-01-01	0.0087380000000000000
1980-01-01	0.0027949999999999997
1981-01-01	0.0024910000000000000
1982-01-01	0.0023920000000000000
1983-01-01	0.0021990000000000000
1984-01-01	0.0019800000000000000
1985-01-01	0.0018399999999999998
1986-01-01	0.0197810000000000000
1987-01-01	0.0204100000000000000
1988-01-01	0.0189430000000000000
1989-01-01	0.0180290000000000000
1990-01-01	0.0195669999999999980
1991-01-01	0.0210560000000000020
1992-01-01	0.0274649999999999960
1993-01-01	0.0264580000000000000
1994-01-01	0.0265850000000000000
1995-01-01	0.0284310000000000000
1996-01-01	0.0269250000000000000
1997-01-01	0.0263690000000000000
1998-01-01	0.0268120000000000000
1999-01-01	0.0439520000000000000
2000-01-01	0.0427330000000000000
2001-01-01	0.0424880000000000000
2002-01-01	0.0416310000000000000
2003-01-01	0.0405880000000000000
2004-01-01	0.0385660000000000000
2005-01-01	0.0366210000000000000
2006-01-01	0.0365770000000000000
2007-01-01	0.0360490000000000000
2008-01-01	0.0364440000000000000
2009-01-01	0.0398090000000000000
2010-01-01	0.0396269999999999960
2011-01-01	0.0393350000000000000
2012-01-01	0.0390150000000000000
2013-01-01	0.0396190000000000000
2014-01-01	0.0373140000000000000
2015-01-01	0.0362130000000000000
2016-01-01	0.0351530000000000000
2017-01-01	0.0341450000000000000