Year	Percent
1980-01-01	0.19414700000000001
1981-01-01	0.17975100000000000
1982-01-01	0.16892100000000002
1983-01-01	0.17397900000000000
1984-01-01	0.17308600000000000
1985-01-01	0.05762500000000000
1986-01-01	0.12270299999999999
1987-01-01	0.22365800000000000
1988-01-01	0.16369200000000000
1989-01-01	0.15220400000000000
1990-01-01	0.15055400000000000
1991-01-01	0.47416300000000000
1992-01-01	0.37406600000000000
1993-01-01	0.90736200000000010
1994-01-01	0.99519000000000000
1995-01-01	1.32704000000000000
1996-01-01	2.64460000000000000
1997-01-01	3.31150999999999970
1998-01-01	4.84353000000000000
1999-01-01	7.01493999999999900
2000-01-01	8.52007000000000000
2001-01-01	11.83640000000000000
2002-01-01	12.19720000000000000
2003-01-01	13.11580000000000000
2004-01-01	11.25310000000000000
2005-01-01	9.29162000000000000
2006-01-01	9.49750000000000000
2007-01-01	8.93250000000000000
2008-01-01	7.18375000000000000
2009-01-01	9.89597000000000000
2010-01-01	8.43256000000000000
2011-01-01	8.52955000000000000
2012-01-01	8.98913999999999900
2013-01-01	10.80390000000000000
2014-01-01	12.20510000000000000
2015-01-01	16.94780000000000000
2016-01-01	18.48600000000000000