Year	Percent
1975-01-01	0.066284000000000010
1976-01-01	0.053052999999999996
1977-01-01	0.034625000000000000
1978-01-01	0.056275000000000000
1979-01-01	0.032449000000000000
1980-01-01	0.047229000000000000
1981-01-01	0.047048000000000000
1982-01-01	0.031014000000000000
1983-01-01	0.013602000000000001
1984-01-01	0.022935000000000000
1985-01-01	0.018300000000000000
1986-01-01	0.015019999999999999
1987-01-01	0.014316999999999998
1988-01-01	0.009687999999999999
1989-01-01	0.028196000000000000
1990-01-01	0.124039000000000010
1991-01-01	0.184122000000000000
1992-01-01	0.447080000000000030
1993-01-01	0.284834000000000030
1994-01-01	0.370535000000000000
1995-01-01	0.383723000000000000
1996-01-01	0.242114000000000000
1997-01-01	0.177989000000000000
1998-01-01	0.143101000000000000
1999-01-01	0.250422000000000000
2000-01-01	0.205911999999999980
2001-01-01	0.259025000000000000
2002-01-01	0.394476000000000050
2003-01-01	0.409564000000000000
2004-01-01	0.420207000000000000
2005-01-01	0.314632000000000000
2006-01-01	0.296772000000000000
2007-01-01	0.236614000000000000
2008-01-01	0.214797000000000000
2009-01-01	0.173313000000000020
2010-01-01	0.139565000000000020
2011-01-01	0.122873000000000000
2012-01-01	0.112935000000000000
2013-01-01	0.109902000000000000
2014-01-01	0.107814000000000010
2015-01-01	0.160742000000000000
2016-01-01	0.152720000000000000
2017-01-01	0.131295000000000000