Year	Percent
1980-01-01	2.07845999999999980
1981-01-01	2.42500000000000000
1982-01-01	2.39378000000000000
1983-01-01	1.97423000000000000
1984-01-01	1.48498000000000000
1985-01-01	1.97648000000000000
1986-01-01	1.92340999999999980
1987-01-01	1.52461000000000000
1988-01-01	0.94048500000000000
1989-01-01	0.75279900000000000
1990-01-01	0.40290200000000000
1991-01-01	0.35809000000000000
1992-01-01	0.37671300000000000
1993-01-01	0.42211800000000005
1994-01-01	0.32019600000000000
1995-01-01	0.16472400000000000
1996-01-01	0.58404500000000000
1997-01-01	1.50090000000000000
1998-01-01	2.12314000000000020
1999-01-01	3.44929000000000000
2000-01-01	4.26218000000000000
2001-01-01	5.18901999999999900
2002-01-01	6.26354000000000000
2003-01-01	6.69138999999999900
2004-01-01	6.67203000000000000
2005-01-01	5.36158000000000000
2006-01-01	5.38814000000000000
2007-01-01	4.13543000000000000
2008-01-01	4.41801999999999900
2009-01-01	4.14809000000000000
2010-01-01	4.29859000000000000
2011-01-01	5.64494000000000000
2012-01-01	8.33215000000000000
2013-01-01	6.70689000000000000
2014-01-01	7.83658999999999900
2015-01-01	10.64150000000000000
2016-01-01	16.67290000000000000