Year	Percent
1980-01-01	0.12432800000000000
1981-01-01	0.13734000000000002
1982-01-01	0.14332600000000000
1983-01-01	0.78274700000000000
1984-01-01	2.40626000000000000
1985-01-01	3.23869000000000000
1986-01-01	2.68994000000000000
1987-01-01	6.03477000000000000
1988-01-01	7.42480000000000000
1989-01-01	8.55201000000000100
1990-01-01	12.27580000000000000
1991-01-01	11.12730000000000000
1992-01-01	8.56646999999999900
1993-01-01	10.24180000000000000
1994-01-01	13.74250000000000000
1995-01-01	14.79460000000000000
1996-01-01	18.14210000000000000
1997-01-01	24.25940000000000000
1998-01-01	26.94800000000000000
1999-01-01	27.23130000000000000
2000-01-01	30.55650000000000000
2001-01-01	32.44090000000000000
2002-01-01	24.57380000000000000
2003-01-01	19.77930000000000000
2004-01-01	27.01260000000000000
2005-01-01	38.46130000000000000
2006-01-01	61.63060000000000000
2007-01-01	88.12210000000000000
2008-01-01	75.31900000000000000
2009-01-01	58.44050000000000000
2010-01-01	49.91840000000000000
2011-01-01	41.40990000000000000
2012-01-01	29.16900000000000000
2013-01-01	20.61180000000000000
2014-01-01	19.30170000000000000
2015-01-01	22.79030000000000000
2016-01-01	26.82160000000000000
2017-01-01	28.23900000000000000