Year	Percent
1980-01-01	0.58914000000000000
1981-01-01	0.62579200000000000
1982-01-01	0.66743500000000000
1983-01-01	0.84069599999999990
1984-01-01	0.82451600000000000
1985-01-01	0.82938200000000000
1986-01-01	0.26685400000000000
1987-01-01	0.22333100000000000
1988-01-01	0.19645200000000000
1989-01-01	0.16133900000000000
1990-01-01	0.16133900000000000
1991-01-01	0.16133900000000000
1992-01-01	0.12190699999999999
1993-01-01	1.15967999999999980
1994-01-01	0.84051300000000000
1995-01-01	0.55399300000000010
1996-01-01	2.21245999999999960
1997-01-01	3.21377000000000020
1998-01-01	4.15383000000000000
1999-01-01	5.68730000000000000
2000-01-01	6.06890000000000000
2001-01-01	8.14586000000000000
2002-01-01	9.71010000000000000
2003-01-01	8.91628000000000000
2004-01-01	6.78715000000000000
2005-01-01	5.81061000000000000
2006-01-01	4.70624000000000000
2007-01-01	4.13930000000000000
2008-01-01	4.22479000000000050
2009-01-01	5.51136999999999900
2010-01-01	5.67325000000000000
2011-01-01	6.05188000000000100
2012-01-01	7.61274000000000000
2013-01-01	11.05020000000000000
2014-01-01	14.94390000000000000
2015-01-01	18.33300000000000000
2016-01-01	18.49480000000000000