Year	Percent
1983-01-01	1.7731000000000000
1984-01-01	2.2578099999999997
1985-01-01	2.9080200000000000
1986-01-01	3.5938700000000000
1987-01-01	4.1160900000000000
1988-01-01	4.2972000000000000
1989-01-01	4.9931300000000010
1990-01-01	5.4202400000000000
1991-01-01	5.6856500000000000
1992-01-01	5.7354400000000005
1993-01-01	5.9929200000000000
1994-01-01	6.9418300000000000
1995-01-01	6.3301200000000000
1996-01-01	6.2943400000000000
1997-01-01	6.6211300000000000
1998-01-01	6.7314399999999990
1999-01-01	7.2851200000000000
2000-01-01	8.0235600000000000
2001-01-01	6.5378300000000005
2002-01-01	6.8469200000000000
2003-01-01	8.4218700000000000
2004-01-01	9.1968900000000000
2005-01-01	9.7021000000000000
2006-01-01	12.5170000000000010
2007-01-01	16.4587000000000000
2008-01-01	14.3301000000000000
2009-01-01	15.2218000000000000
2010-01-01	15.2034000000000000
2011-01-01	13.8887000000000000
2012-01-01	14.9626000000000000
2013-01-01	12.5584000000000000
2014-01-01	12.5842000000000000
2015-01-01	11.7289000000000000
2016-01-01	10.3911000000000000