Year	Percent
1980-01-01	4.0432900000000000
1981-01-01	7.9490399999999990
1982-01-01	9.7690800000000000
1983-01-01	6.4328800000000000
1984-01-01	6.9612300000000005
1985-01-01	4.9475700000000000
1986-01-01	5.2761300000000000
1987-01-01	7.3637000000000000
1988-01-01	7.1663000000000000
1989-01-01	27.9637000000000000
1990-01-01	9.2491200000000000
1991-01-01	5.4184700000000000
1992-01-01	4.4670000000000000
1993-01-01	5.1356500000000000
1994-01-01	3.9768199999999996
1995-01-01	5.5506800000000010
1996-01-01	6.1960800000000000
1997-01-01	6.4440200000000000
1998-01-01	7.1736200000000000
1999-01-01	9.0701900000000000
2000-01-01	9.2203200000000000
2001-01-01	10.1635000000000000
2002-01-01	27.8408000000000000
2003-01-01	23.2995000000000000
2004-01-01	21.2868000000000000
2005-01-01	17.2830000000000000
2006-01-01	12.3748000000000000
2007-01-01	9.2522500000000000
2008-01-01	7.5913100000000010
2009-01-01	9.1025300000000000
2010-01-01	9.2123400000000000
2011-01-01	7.3005200000000000
2012-01-01	7.2186200000000000
2013-01-01	6.6726600000000005
2014-01-01	8.5123000000000000
2015-01-01	8.7855600000000000
2016-01-01	8.9923399999999990