Year	Percent
1983-01-01	0.5442690000000000
1984-01-01	1.1737700000000000
1985-01-01	2.6906900000000000
1986-01-01	3.3392900000000000
1987-01-01	3.4133400000000003
1988-01-01	2.3598700000000000
1989-01-01	1.7373400000000000
1990-01-01	1.5649600000000001
1991-01-01	2.1457100000000000
1992-01-01	2.8388100000000000
1993-01-01	3.7995400000000004
1994-01-01	4.2253200000000000
1995-01-01	4.7663199999999994
1996-01-01	6.9950300000000000
1997-01-01	8.7589899999999990
1998-01-01	14.0659000000000000
1999-01-01	10.1643000000000000
2000-01-01	8.6957500000000000
2001-01-01	8.7160600000000000
2002-01-01	8.5054000000000000
2003-01-01	8.8677700000000000
2004-01-01	9.1847600000000000
2005-01-01	8.8924500000000000
2006-01-01	9.4897100000000000
2007-01-01	9.6885800000000000
2008-01-01	10.4682000000000000
2009-01-01	13.7329000000000000
2010-01-01	12.1118000000000000
2011-01-01	12.4809000000000000
2012-01-01	13.4101000000000000
2013-01-01	13.9670000000000000
2014-01-01	13.2782000000000000
2015-01-01	12.7541000000000000
2016-01-01	12.2944000000000000