Year	Percent
1977-01-01	0.013479000000000000
1978-01-01	0.013704000000000000
1979-01-01	0.023243000000000000
1980-01-01	0.015194000000000000
1981-01-01	0.013022999999999998
1982-01-01	0.008483000000000000
1983-01-01	0.008516000000000000
1984-01-01	0.175549000000000000
1985-01-01	0.204047000000000000
1986-01-01	0.229986000000000020
1987-01-01	0.229986000000000020
1988-01-01	0.229986000000000020
1989-01-01	0.229986000000000020
1990-01-01	0.229986000000000020
1991-01-01	0.229986000000000020
1992-01-01	0.229986000000000020
1993-01-01	0.229986000000000020
1994-01-01	0.229986000000000020
1995-01-01	9.907500000000000000
1996-01-01	8.160739999999999000
1997-01-01	10.819800000000000000
1998-01-01	16.420800000000000000
1999-01-01	16.057700000000000000
2000-01-01	13.356400000000000000
2001-01-01	12.423800000000000000
2002-01-01	9.693389999999999000
2003-01-01	0.125111000000000000
2004-01-01	0.176624000000000000
2005-01-01	0.352250000000000000
2006-01-01	1.096310000000000100
2007-01-01	1.968680000000000000
2008-01-01	1.787810000000000000
2009-01-01	2.653710000000000000
2010-01-01	2.340180000000000000
2011-01-01	1.828860000000000000
2012-01-01	1.776560000000000000
2013-01-01	2.069379999999999800
2014-01-01	2.274340000000000000
2015-01-01	2.038030000000000000
2016-01-01	6.976690000000000000