Year	Percent
1983-01-01	12.2722000000000000
1984-01-01	19.4222000000000000
1985-01-01	31.7234000000000000
1986-01-01	15.5087000000000000
1987-01-01	14.8988000000000000
1988-01-01	20.3917000000000000
1989-01-01	28.6781000000000000
1990-01-01	20.7814000000000000
1991-01-01	7.1363400000000000
1992-01-01	5.2294900000000000
1993-01-01	9.0119400000000000
1994-01-01	1.8304200000000002
1995-01-01	1.6073200000000000
1996-01-01	2.0242700000000000
1997-01-01	4.1776500000000000
1998-01-01	6.6113399999999990
1999-01-01	27.5608000000000000
2000-01-01	9.5340600000000000
2001-01-01	19.0477000000000000
2002-01-01	13.0834000000000000
2003-01-01	17.8470000000000000
2004-01-01	21.7649000000000000
2005-01-01	31.3279000000000000
2006-01-01	34.4762000000000000
2007-01-01	28.4292000000000000
2008-01-01	29.1794000000000000
2009-01-01	32.2166000000000000
2010-01-01	20.1113000000000000
2011-01-01	18.7226000000000000
2012-01-01	16.2526000000000000
2013-01-01	17.2516000000000000
2014-01-01	15.1720000000000000
2015-01-01	4.9992800000000010
2016-01-01	5.7866300000000010