Year	Percent
1983-01-01	13.44190000000000000
1984-01-01	9.40147000000000000
1985-01-01	14.80490000000000000
1986-01-01	11.14640000000000000
1987-01-01	7.52653000000000000
1988-01-01	7.19368999999999900
1989-01-01	3.84801999999999960
1990-01-01	3.24491000000000000
1991-01-01	2.74507999999999970
1992-01-01	20.44400000000000300
1993-01-01	10.03210000000000000
1994-01-01	9.05998000000000000
1995-01-01	9.49527000000000000
1996-01-01	6.61178999999999900
1997-01-01	4.11338000000000000
1998-01-01	3.06851000000000000
1999-01-01	3.16602000000000000
2000-01-01	3.39406999999999970
2001-01-01	2.23027000000000000
2002-01-01	2.35769000000000030
2003-01-01	1.76250999999999980
2004-01-01	2.80097000000000000
2005-01-01	2.39787000000000000
2006-01-01	2.77216000000000000
2007-01-01	2.72565000000000000
2008-01-01	1.41032999999999990
2009-01-01	1.14405000000000000
2010-01-01	1.18557999999999990
2011-01-01	0.97292400000000000
2012-01-01	0.85134500000000000
2013-01-01	0.50647500000000000
2014-01-01	0.29579500000000000
2015-01-01	0.20914400000000000
2016-01-01	0.14393699999999998