Year	Percent
1980-01-01	2.30607000000000000
1981-01-01	2.74359000000000000
1982-01-01	3.58400999999999970
1983-01-01	5.45673000000000000
1984-01-01	7.39768000000000000
1985-01-01	6.69951000000000100
1986-01-01	7.27835000000000000
1987-01-01	4.85456000000000000
1988-01-01	12.51030000000000000
1989-01-01	9.67978000000000100
1990-01-01	8.79738000000000000
1991-01-01	8.40106999999999900
1992-01-01	8.18727000000000000
1993-01-01	3.83106999999999950
1994-01-01	4.16619000000000000
1995-01-01	4.03881999999999900
1996-01-01	3.34023000000000050
1997-01-01	2.88346000000000000
1998-01-01	3.90331000000000000
1999-01-01	2.35272000000000000
2000-01-01	1.61740000000000000
2001-01-01	1.05203999999999990
2002-01-01	1.44211000000000000
2003-01-01	1.00482000000000000
2004-01-01	1.35243000000000000
2005-01-01	0.35702500000000000
2006-01-01	0.37263200000000000
2007-01-01	0.70577500000000000
2008-01-01	0.73429300000000010
2009-01-01	0.61049100000000000
2010-01-01	0.32335300000000000
2011-01-01	0.16657500000000000
2012-01-01	0.72201000000000000
2013-01-01	0.47131300000000004
2014-01-01	0.81834000000000000
2015-01-01	2.00596000000000000
2016-01-01	5.77836000000000000