Year	Percent
1980-01-01	1.9390100000000000
1981-01-01	3.1611000000000000
1982-01-01	3.5761700000000000
1983-01-01	3.4718400000000003
1984-01-01	3.6625900000000002
1985-01-01	3.2972599999999996
1986-01-01	3.1930300000000000
1987-01-01	3.0151600000000000
1988-01-01	2.7830200000000000
1989-01-01	2.5756200000000002
1990-01-01	2.3803900000000002
1991-01-01	2.5056400000000000
1992-01-01	2.5765400000000000
1993-01-01	0.4456980000000000
1994-01-01	1.6977500000000000
1995-01-01	1.3109800000000000
1996-01-01	1.3682100000000000
1997-01-01	1.5465400000000000
1998-01-01	1.0529800000000000
1999-01-01	0.9758570000000000
2000-01-01	1.2458900000000000
2001-01-01	1.8057900000000002
2002-01-01	0.9602040000000001
2003-01-01	1.1061299999999998
2004-01-01	1.1526100000000001
2005-01-01	0.9926600000000000
2006-01-01	0.9250920000000000
2007-01-01	1.3565300000000000
2008-01-01	1.3865600000000000
2009-01-01	1.4733700000000000
2010-01-01	1.6489200000000002
2011-01-01	1.8496000000000000
2012-01-01	2.3641300000000000
2013-01-01	1.9109500000000000
2014-01-01	3.4616300000000004
2015-01-01	5.0527000000000000
2016-01-01	5.3477500000000000