Year	Percent
1983-01-01	1.41022999999999990
1984-01-01	3.31813000000000050
1985-01-01	1.89335000000000000
1986-01-01	1.26200000000000000
1987-01-01	2.51333000000000000
1988-01-01	1.85655000000000000
1989-01-01	1.74065999999999990
1990-01-01	0.93088300000000000
1991-01-01	1.06936000000000000
1992-01-01	0.47546400000000005
1993-01-01	0.26797000000000000
1994-01-01	0.23761000000000000
1995-01-01	0.51421800000000010
1996-01-01	0.76680500000000010
1997-01-01	7.41416999999999950
1998-01-01	4.78735000000000000
1999-01-01	6.16375000000000000
2000-01-01	7.68416000000000000
2001-01-01	5.48292000000000000
2002-01-01	5.34738000000000000
2003-01-01	5.67662000000000000
2004-01-01	5.67548000000000000
2005-01-01	4.91591000000000000
2006-01-01	5.18856000000000000
2007-01-01	4.30903000000000000
2008-01-01	3.66123000000000000
2009-01-01	3.49670000000000000
2010-01-01	3.19326000000000000
2011-01-01	3.70624000000000000
2012-01-01	2.35257000000000000
2013-01-01	2.39652000000000000
2014-01-01	1.79857000000000000
2015-01-01	2.80861000000000000
2016-01-01	2.65739000000000040