Year	Percent
1975-01-01	1.5051000000000000
1976-01-01	1.2313100000000001
1977-01-01	0.9134950000000001
1978-01-01	1.2964200000000001
1979-01-01	1.6041700000000000
1980-01-01	1.3684000000000000
1981-01-01	1.2493800000000000
1982-01-01	1.1842700000000002
1983-01-01	1.2390600000000000
1984-01-01	1.2942700000000000
1985-01-01	2.1878100000000000
1986-01-01	5.0288900000000005
1987-01-01	8.2287000000000000
1988-01-01	7.6231800000000005
1989-01-01	8.3262500000000000
1990-01-01	9.9590900000000000
1991-01-01	9.5465300000000000
1992-01-01	8.8963900000000000
1993-01-01	10.2202000000000000
1994-01-01	13.2709000000000000
1995-01-01	13.7740000000000010
1996-01-01	14.8570000000000010
1997-01-01	21.6819000000000000
1998-01-01	33.0679000000000000
1999-01-01	43.5594000000000000
2000-01-01	62.5723000000000000
2001-01-01	73.9665000000000000
2002-01-01	69.3375000000000000
2003-01-01	63.8178000000000000
2004-01-01	60.0994000000000000
2005-01-01	59.2553000000000000
2006-01-01	71.2317000000000000
2007-01-01	95.4891000000000000
2008-01-01	95.1054000000000000
2009-01-01	66.3015000000000000
2010-01-01	48.7376000000000000
2011-01-01	48.0733000000000000
2012-01-01	43.0071000000000000
2013-01-01	39.4163000000000000
2014-01-01	39.9043000000000000