Year	Percent
1976-01-01	1.1091600000000001
1977-01-01	1.1939000000000000
1978-01-01	1.4745200000000000
1979-01-01	1.2242300000000000
1980-01-01	1.0178300000000000
1981-01-01	0.7355980000000000
1982-01-01	0.7499939999999999
1983-01-01	1.4490700000000000
1984-01-01	1.4536799999999999
1985-01-01	1.4506200000000000
1986-01-01	1.4304500000000000
1987-01-01	1.3201000000000000
1988-01-01	2.9317700000000000
1989-01-01	2.8806000000000000
1990-01-01	1.8957600000000000
1991-01-01	1.8050000000000000
1992-01-01	1.5228500000000000
1993-01-01	1.6496700000000000
1994-01-01	2.4052500000000000
1995-01-01	4.5477500000000000
1996-01-01	4.3803800000000010
1997-01-01	6.0106900000000000
1998-01-01	6.2605000000000000
1999-01-01	6.8907800000000000
2000-01-01	7.1111900000000000
2001-01-01	8.2479500000000000
2002-01-01	11.3342000000000000
2003-01-01	11.7255000000000000
2004-01-01	11.6281000000000000
2005-01-01	11.6196000000000000
2006-01-01	10.2942000000000000
2007-01-01	9.7897400000000000
2008-01-01	8.7345000000000000
2009-01-01	8.7400899999999990
2010-01-01	7.7682800000000000
2011-01-01	5.7803200000000000
2012-01-01	7.1063700000000000
2013-01-01	6.0647300000000000
2014-01-01	7.3968399999999990
2015-01-01	10.3367000000000000
2016-01-01	11.8562000000000000