Year	Percent
1980-01-01	1.67710999999999990
1981-01-01	2.44588000000000000
1982-01-01	2.51335000000000000
1983-01-01	2.40178000000000000
1984-01-01	1.86872000000000020
1985-01-01	0.21996600000000000
1986-01-01	0.25310500000000000
1987-01-01	0.30853900000000000
1988-01-01	0.23376100000000002
1989-01-01	0.21869400000000000
1990-01-01	8.81657000000000000
1991-01-01	7.21808999999999900
1992-01-01	6.27863000000000100
1993-01-01	5.62284000000000000
1994-01-01	5.29273000000000100
1995-01-01	4.79140000000000000
1996-01-01	4.35935000000000000
1997-01-01	3.87413000000000000
1998-01-01	3.01885000000000000
1999-01-01	2.89356000000000000
2000-01-01	2.68952000000000000
2001-01-01	2.36317000000000000
2002-01-01	2.14595999999999960
2003-01-01	1.40856000000000000
2004-01-01	0.51096200000000000
2005-01-01	0.47335200000000005
2006-01-01	0.42568300000000000
2007-01-01	0.35501600000000000
2008-01-01	0.30884500000000000
2009-01-01	0.32064300000000000
2010-01-01	0.26252800000000004
2011-01-01	0.81122800000000000
2012-01-01	1.26429000000000000
2013-01-01	5.11498000000000000
2014-01-01	4.87691000000000000
2015-01-01	4.57791000000000000
2016-01-01	5.20451000000000000