Year	Percent
1980-01-01	0.6195520000000000
1981-01-01	0.8226020000000000
1982-01-01	1.2606000000000000
1983-01-01	1.5644900000000000
1984-01-01	2.2378299999999998
1985-01-01	3.4139900000000000
1986-01-01	3.2593700000000000
1987-01-01	3.8186500000000000
1988-01-01	3.8776800000000002
1989-01-01	4.1377500000000000
1990-01-01	4.2542000000000000
1991-01-01	5.1106300000000005
1992-01-01	4.5308699999999990
1993-01-01	6.8785500000000000
1994-01-01	8.5026500000000000
1995-01-01	9.4295900000000000
1996-01-01	9.2048700000000000
1997-01-01	10.5750000000000000
1998-01-01	12.2798000000000000
1999-01-01	15.6745000000000000
2000-01-01	21.7577000000000000
2001-01-01	27.1744000000000000
2002-01-01	30.6780000000000000
2003-01-01	33.1941000000000000
2004-01-01	36.0235000000000000
2005-01-01	34.3823000000000000
2006-01-01	41.5916000000000000
2007-01-01	45.0889000000000000
2008-01-01	44.9405000000000000
2009-01-01	55.5172000000000000
2010-01-01	54.8278000000000000
2011-01-01	50.4965000000000000
2012-01-01	53.4549000000000000
2013-01-01	54.7176000000000000
2014-01-01	46.5061000000000000
2015-01-01	48.3773000000000000
2016-01-01	44.4700000000000000