Year	Percent
1980-01-01	0.3209250000000000
1981-01-01	0.3912410000000000
1982-01-01	0.5276420000000000
1983-01-01	0.8691070000000000
1984-01-01	1.2009400000000000
1985-01-01	1.7624000000000000
1986-01-01	2.4989300000000000
1987-01-01	3.0661200000000000
1988-01-01	3.4070400000000003
1989-01-01	4.0343500000000000
1990-01-01	3.8277900000000002
1991-01-01	3.8523300000000003
1992-01-01	3.9745600000000000
1993-01-01	5.2158300000000000
1994-01-01	6.9927100000000010
1995-01-01	8.3667600000000010
1996-01-01	11.3051000000000000
1997-01-01	14.9205000000000000
1998-01-01	18.6943000000000000
1999-01-01	23.6192000000000000
2000-01-01	34.3403000000000000
2001-01-01	38.3422000000000000
2002-01-01	46.6406000000000000
2003-01-01	49.8529000000000000
2004-01-01	53.4359000000000000
2005-01-01	51.3213000000000000
2006-01-01	60.3276000000000000
2007-01-01	60.6860000000000100
2008-01-01	53.8150000000000000
2009-01-01	58.9372000000000000
2010-01-01	54.9481000000000000
2011-01-01	50.5592000000000000
2012-01-01	54.7778000000000000
2013-01-01	51.3880000000000050
2014-01-01	46.5319000000000000
2015-01-01	48.5248000000000000
2016-01-01	46.7409000000000000