Year	Percent
1985-01-01	12.4888000000000000
1986-01-01	10.5651000000000000
1987-01-01	7.8751200000000000
1988-01-01	8.1981100000000000
1989-01-01	10.1677000000000000
1990-01-01	8.5174800000000000
1991-01-01	6.6088000000000000
1992-01-01	5.2933300000000000
1993-01-01	4.9720699999999995
1994-01-01	4.6317300000000000
1995-01-01	5.2534600000000000
1996-01-01	4.5261400000000000
1997-01-01	3.1992000000000000
1998-01-01	5.2776600000000000
1999-01-01	4.2115599999999995
2000-01-01	3.4206500000000000
2001-01-01	3.2225200000000003
2002-01-01	4.0780699999999990
2003-01-01	4.3778300000000000
2004-01-01	4.4260699999999990
2005-01-01	4.4639200000000000
2006-01-01	4.5423300000000010
2007-01-01	4.9583900000000005
2008-01-01	4.9691300000000010
2009-01-01	7.4643100000000000
2010-01-01	8.9478600000000000
2011-01-01	8.7397500000000000
2012-01-01	10.1597000000000000
2013-01-01	13.7459000000000000
2014-01-01	13.4101000000000000
2015-01-01	17.0566000000000000
2016-01-01	17.8359000000000000