Year	Percent
1980-01-01	0.8179489999999999
1981-01-01	1.1578600000000001
1982-01-01	1.2166400000000000
1983-01-01	3.0679200000000000
1984-01-01	4.7579900000000000
1985-01-01	5.2958900000000000
1986-01-01	5.9691300000000010
1987-01-01	4.6972400000000000
1988-01-01	4.1407300000000005
1989-01-01	3.8665100000000000
1990-01-01	3.9810800000000004
1991-01-01	3.7581500000000000
1992-01-01	2.7695100000000000
1993-01-01	1.3647000000000000
1994-01-01	0.3613240000000000
1995-01-01	0.1382350000000000
1996-01-01	0.1974970000000000
1997-01-01	1.7421500000000000
1998-01-01	3.4945800000000005
1999-01-01	2.3154500000000000
2000-01-01	3.8251199999999996
2001-01-01	4.0386100000000000
2002-01-01	3.1182100000000000
2003-01-01	2.6288600000000000
2004-01-01	3.3730700000000000
2005-01-01	3.5517199999999995
2006-01-01	3.3271300000000004
2007-01-01	2.1604000000000000
2008-01-01	1.3249100000000000
2009-01-01	1.1267399999999999
2010-01-01	2.3321600000000000
2011-01-01	2.0291400000000000
2012-01-01	2.2534099999999997
2013-01-01	3.1007000000000000
2014-01-01	6.3599600000000000
2015-01-01	4.8337800000000000
2016-01-01	6.5196700000000000