Year	Percent
1975-01-01	0.68875000000000000
1976-01-01	0.57826000000000000
1977-01-01	0.40978100000000006
1978-01-01	0.45115900000000003
1979-01-01	0.68636200000000000
1980-01-01	1.23380000000000000
1981-01-01	2.00461000000000000
1982-01-01	1.46647000000000020
1983-01-01	0.71719600000000010
1984-01-01	0.85068199999999990
1985-01-01	1.90483000000000000
1986-01-01	4.35720000000000000
1987-01-01	4.79579000000000000
1988-01-01	3.59683000000000000
1989-01-01	3.89041999999999980
1990-01-01	3.86375999999999960
1991-01-01	2.61639000000000000
1992-01-01	1.95075000000000000
1993-01-01	4.09773000000000000
1994-01-01	8.35554000000000000
1995-01-01	8.86162000000000000
1996-01-01	7.45853999999999900
1997-01-01	11.92010000000000000
1998-01-01	27.03920000000000000
1999-01-01	40.05050000000000000
2000-01-01	63.44860000000000000
2001-01-01	67.61940000000000000
2002-01-01	47.83500000000000000
2003-01-01	45.48570000000000000
2004-01-01	47.53180000000000000
2005-01-01	52.88630000000000000
2006-01-01	58.69920000000000000
2007-01-01	79.91100000000000000
2008-01-01	79.43250000000000000
2009-01-01	51.32030000000000000
2010-01-01	36.54800000000000000
2011-01-01	34.00550000000000000
2012-01-01	37.96380000000000000
2013-01-01	37.16370000000000000
2014-01-01	65.78410000000000000