Year	Percent
1975-01-01	0.31156400000000000
1976-01-01	0.30520600000000000
1977-01-01	0.25337800000000005
1978-01-01	0.28045800000000000
1979-01-01	0.30849899999999997
1980-01-01	0.31629400000000000
1981-01-01	0.36658800000000000
1982-01-01	0.38204800000000000
1983-01-01	0.39527199999999996
1984-01-01	0.36461000000000000
1985-01-01	0.34452000000000000
1986-01-01	0.39097300000000000
1987-01-01	0.42550299999999996
1988-01-01	0.41578200000000000
1989-01-01	0.36302900000000000
1990-01-01	0.41165799999999997
1991-01-01	0.39526500000000003
1992-01-01	0.44399700000000003
1993-01-01	0.52114200000000000
1994-01-01	1.32807000000000000
1995-01-01	1.37323000000000000
1996-01-01	1.21098000000000000
1997-01-01	1.16343000000000000
1998-01-01	1.13041000000000010
1999-01-01	1.11145000000000000
2000-01-01	1.11334000000000000
2001-01-01	1.03645000000000000
2002-01-01	0.97265100000000000
2003-01-01	0.92511400000000000
2004-01-01	0.96166500000000000
2005-01-01	0.95507500000000000
2006-01-01	0.93681600000000000
2007-01-01	0.90786399999999990
2008-01-01	0.82112299999999990
2009-01-01	1.29782000000000000
2010-01-01	1.50084000000000000
2011-01-01	1.56256000000000000
2012-01-01	1.35762000000000000
2013-01-01	1.23003000000000000
2014-01-01	1.09322000000000000
2015-01-01	1.01447000000000000
2016-01-01	0.94076700000000000
2017-01-01	0.93909200000000000