Year	Percent
1960-01-01	4.9291800000000010
1961-01-01	4.9427699999999990
1962-01-01	4.8991000000000000
1963-01-01	5.0099200000000000
1964-01-01	5.1035500000000000
1965-01-01	5.1750400000000000
1966-01-01	5.1769900000000000
1967-01-01	5.3650100000000000
1968-01-01	5.4177500000000000
1969-01-01	5.4080900000000005
1970-01-01	5.5071900000000005
1971-01-01	5.5724300000000010
1972-01-01	5.4138400000000000
1973-01-01	5.1918100000000000
1974-01-01	5.1587300000000000
1975-01-01	4.9470500000000000
1976-01-01	4.7964300000000000
1977-01-01	4.6889100000000000
1978-01-01	4.4873800000000000
1979-01-01	4.3196300000000000
1980-01-01	4.1723500000000000
1981-01-01	3.8812800000000003
1982-01-01	3.9643300000000004
1983-01-01	3.9363200000000000
1984-01-01	3.8542600000000000
1985-01-01	3.8836900000000000
1986-01-01	4.0775500000000000
1987-01-01	4.2991100000000000
1988-01-01	4.3182500000000000
1989-01-01	4.0946200000000000
1990-01-01	3.8844100000000000
1991-01-01	4.0692699999999995
1992-01-01	4.3037900000000000
1993-01-01	4.5741900000000000
1994-01-01	4.7782599999999995
1995-01-01	4.8701300000000005
1996-01-01	4.7717700000000000
1997-01-01	4.7875500000000000
1998-01-01	4.8683300000000000
1999-01-01	4.8267300000000000
2000-01-01	4.8394100000000000
2001-01-01	5.0534800000000000
2002-01-01	5.4084600000000000
2003-01-01	5.6707100000000000
2004-01-01	5.6852599999999995
2005-01-01	5.6330900000000000
2006-01-01	5.5588100000000000
2007-01-01	5.2889300000000010
2008-01-01	5.3890199999999995
2009-01-01	8.7290400000000000
2010-01-01	12.4424000000000000
2011-01-01	14.7339000000000000
2012-01-01	15.9294000000000000
2013-01-01	18.9798000000000000
2014-01-01	23.0044000000000000
2015-01-01	23.3892000000000000
2016-01-01	22.7163000000000000