Year	Percent
1984-01-01	1.3200000000000000
1985-01-01	1.1940000000000000
1986-01-01	1.3219999999999998
1987-01-01	1.6260000000000000
1988-01-01	1.8270000000000000
1989-01-01	1.3459999999999999
1990-01-01	1.3659999999999999
1991-01-01	2.4400000000000000
1992-01-01	2.9490000000000000
1993-01-01	4.3220000000000000
1994-01-01	4.2310000000000000
1995-01-01	2.8440000000000000
1996-01-01	2.3810000000000000
1997-01-01	2.0000000000000000
1998-01-01	1.6300000000000000
1999-01-01	2.1950000000000000
2000-01-01	2.4663300000000000
2001-01-01	3.4618300000000004
2002-01-01	5.4935000000000000
2003-01-01	5.8790800000000000
2004-01-01	5.6876700000000000
2005-01-01	4.4611700000000000
2006-01-01	3.5050000000000000
2007-01-01	3.1864200000000000
2008-01-01	2.9325799999999997
2009-01-01	2.8948300000000000
2010-01-01	3.3790800000000000
2011-01-01	3.5094199999999995
2012-01-01	3.2128300000000000
2013-01-01	2.9596700000000000
2014-01-01	3.0230799999999998
2015-01-01	2.8280000000000003
2016-01-01	2.3537500000000000