Year	Percent
1974-01-01	0.7346180000000000
1975-01-01	0.7724870000000000
1976-01-01	1.1439200000000000
1977-01-01	1.0324600000000000
1978-01-01	1.1322600000000000
1979-01-01	0.8924620000000001
1980-01-01	0.8742190000000001
1981-01-01	0.8172090000000000
1982-01-01	0.7440740000000000
1983-01-01	0.7936940000000000
1984-01-01	0.9203319999999999
1985-01-01	2.0207300000000000
1986-01-01	2.0193300000000000
1987-01-01	1.6046900000000000
1988-01-01	1.5403400000000000
1989-01-01	1.6899800000000000
1990-01-01	1.6503400000000001
1991-01-01	1.8081099999999999
1992-01-01	0.9595809999999999
1993-01-01	0.9499540000000001
1994-01-01	1.5576700000000000
1995-01-01	1.1472300000000000
1996-01-01	2.0042600000000000
1997-01-01	1.7518700000000000
1998-01-01	1.1699400000000000
1999-01-01	1.4505400000000000
2000-01-01	2.6451100000000000
2001-01-01	5.1415600000000000
2002-01-01	6.9992199999999990
2003-01-01	8.8837900000000000
2004-01-01	9.2416200000000000
2005-01-01	9.1010100000000000
2006-01-01	10.5397000000000000
2007-01-01	11.2722000000000000
2008-01-01	10.6549000000000000
2009-01-01	10.5756000000000000
2010-01-01	10.6084000000000000
2011-01-01	6.4998000000000000
2012-01-01	8.9163300000000000
2013-01-01	9.7369700000000000
2014-01-01	9.5316400000000000
2015-01-01	8.8947000000000000
2016-01-01	8.0033700000000000
2017-01-01	8.3559900000000000