Year	Percent
1975-01-01	0.92772500000000000
1976-01-01	0.87552199999999990
1977-01-01	0.49435600000000000
1978-01-01	0.38733500000000000
1979-01-01	1.17355000000000000
1980-01-01	1.25890000000000000
1981-01-01	0.48916499999999996
1982-01-01	0.18406199999999998
1983-01-01	0.11323900000000000
1984-01-01	0.17182600000000000
1985-01-01	0.29215500000000000
1986-01-01	0.25037000000000000
1987-01-01	0.11093099999999999
1988-01-01	1.70635999999999990
1989-01-01	0.31635900000000000
1990-01-01	0.29541600000000000
1991-01-01	1.30671000000000000
1992-01-01	4.39640000000000000
1993-01-01	13.80640000000000000
1994-01-01	31.56910000000000000
1995-01-01	28.04530000000000000
1996-01-01	11.61260000000000000
1997-01-01	11.86750000000000000
1998-01-01	10.74950000000000000
1999-01-01	6.68846000000000100
2000-01-01	3.69591000000000000
2001-01-01	2.94154000000000030
2002-01-01	1.66356000000000000
2003-01-01	1.64523000000000000
2004-01-01	2.27170000000000000
2005-01-01	2.47375000000000000
2006-01-01	1.80479000000000010
2007-01-01	1.42388999999999990
2008-01-01	1.11891000000000000
2009-01-01	0.65203700000000000
2010-01-01	0.47070300000000000
2011-01-01	0.46051899999999996
2012-01-01	0.32510100000000003
2013-01-01	0.30813700000000000
2014-01-01	0.48281499999999994
2015-01-01	0.48431100000000000
2016-01-01	0.55800200000000000
2017-01-01	0.82177000000000010