Year	Percent
1983-01-01	0.7202370000000000
1984-01-01	1.1145600000000000
1985-01-01	2.1185700000000000
1986-01-01	2.1771000000000000
1987-01-01	3.6696600000000000
1988-01-01	4.0587700000000000
1989-01-01	3.9165800000000000
1990-01-01	5.6032900000000000
1991-01-01	6.4499000000000000
1992-01-01	6.0971900000000000
1993-01-01	5.4886099999999995
1994-01-01	7.3668400000000000
1995-01-01	6.6227500000000000
1996-01-01	6.3947800000000000
1997-01-01	8.9905300000000000
1998-01-01	7.7104500000000000
1999-01-01	5.9060000000000010
2000-01-01	5.0638100000000000
2001-01-01	4.2706599999999995
2002-01-01	3.3361099999999997
2003-01-01	3.8223500000000000
2004-01-01	4.6253199999999990
2005-01-01	4.9715000000000000
2006-01-01	6.1157900000000005
2007-01-01	7.7124700000000000
2008-01-01	5.3192200000000000
2009-01-01	5.9194600000000000
2010-01-01	8.0816100000000010
2011-01-01	8.9038000000000000
2012-01-01	8.5545100000000000
2013-01-01	11.2826000000000000
2014-01-01	12.2998000000000000
2015-01-01	8.8657100000000000
2016-01-01	8.7576399999999990