Year	Percent
1983-01-01	21.8529000000000000
1984-01-01	15.7031000000000000
1985-01-01	13.6164000000000000
1986-01-01	8.6707800000000000
1987-01-01	1.3503399999999999
1988-01-01	30.0778000000000000
1989-01-01	17.9975000000000000
1990-01-01	77.1480000000000000
1991-01-01	24.9623000000000000
1992-01-01	21.3657000000000000
1993-01-01	19.7253000000000000
1994-01-01	18.2829000000000000
1995-01-01	14.1823000000000000
1996-01-01	7.6600000000000000
1997-01-01	7.6310300000000000
1998-01-01	7.8742700000000000
1999-01-01	4.5922300000000010
2000-01-01	4.7362000000000000
2001-01-01	3.9613199999999997
2002-01-01	5.8770300000000000
2003-01-01	6.0688900000000010
2004-01-01	5.4204000000000000
2005-01-01	5.8215600000000000
2006-01-01	6.4757700000000000
2007-01-01	9.6317399999999990
2008-01-01	8.7913700000000000
2009-01-01	8.1458500000000000
2010-01-01	9.4421500000000000
2011-01-01	7.0797700000000000
2012-01-01	7.7288900000000000
2013-01-01	7.7769500000000000
2014-01-01	7.8423000000000000
2015-01-01	6.6942800000000000
2016-01-01	6.6474500000000000