Year	Percent
1975-01-01	0.12397000000000001
1976-01-01	0.14141400000000000
1977-01-01	0.22775700000000001
1978-01-01	0.43485100000000004
1979-01-01	0.68918200000000000
1980-01-01	1.18420000000000000
1981-01-01	1.37136000000000010
1982-01-01	1.69101000000000000
1983-01-01	2.11284000000000030
1984-01-01	2.13717000000000020
1985-01-01	2.25512000000000020
1986-01-01	1.84523000000000000
1987-01-01	1.66587000000000000
1988-01-01	1.50282999999999990
1989-01-01	1.30546000000000000
1990-01-01	1.14039000000000000
1991-01-01	1.03768000000000000
1992-01-01	0.39888200000000000
1993-01-01	0.86251100000000000
1994-01-01	0.87325499999999990
1995-01-01	1.00147000000000000
1996-01-01	0.98666800000000000
1997-01-01	1.10428000000000000
1998-01-01	1.25310000000000000
1999-01-01	1.15272000000000000
2000-01-01	1.34248000000000000
2001-01-01	1.04112999999999990
2002-01-01	1.02754000000000000
2003-01-01	1.05552000000000000
2004-01-01	0.93806700000000000
2005-01-01	0.62699600000000000
2006-01-01	0.60126700000000000
2007-01-01	0.62175200000000010
2008-01-01	0.65151700000000000
2009-01-01	1.35174000000000000
2010-01-01	1.29965000000000000
2011-01-01	1.41730000000000000
2012-01-01	1.42288000000000000
2013-01-01	1.56657999999999990
2014-01-01	1.60164000000000000
2015-01-01	1.46853000000000000
2016-01-01	1.52275000000000000
2017-01-01	1.47811000000000000