Year	Percent
1983-01-01	1.3507700000000000
1984-01-01	1.5678400000000000
1985-01-01	1.0643200000000002
1986-01-01	1.1661900000000000
1987-01-01	1.3274500000000000
1988-01-01	1.8019700000000000
1989-01-01	0.8709940000000000
1990-01-01	1.2773000000000000
1991-01-01	3.1331900000000004
1992-01-01	0.9807110000000001
1993-01-01	2.1648200000000000
1994-01-01	1.6411600000000000
1995-01-01	1.5151700000000001
1996-01-01	1.2871800000000000
1997-01-01	1.6498400000000002
1998-01-01	1.4593100000000000
1999-01-01	3.5669400000000000
2000-01-01	2.0399700000000003
2001-01-01	1.8944400000000001
2002-01-01	2.2843100000000000
2003-01-01	2.0721400000000000
2004-01-01	1.6708300000000000
2005-01-01	1.4207100000000001
2006-01-01	2.0540000000000003
2007-01-01	2.0028700000000000
2008-01-01	1.3095800000000000
2009-01-01	0.9587570000000000
2010-01-01	0.5035210000000000
2011-01-01	1.6851900000000002
2012-01-01	1.7061300000000000
2013-01-01	2.3338500000000000
2014-01-01	2.0179700000000000
2015-01-01	1.9427000000000000
2016-01-01	1.7166200000000000