Annual Percent
1960-01-01 11.1936000000000000
1961-01-01 10.8234000000000000
1962-01-01 8.7877500000000000
1963-01-01 7.9584600000000005
1964-01-01 7.1653600000000010
1965-01-01 10.4004000000000000
1966-01-01 10.3284000000000000
1967-01-01 9.0592899999999990
1968-01-01 10.1739000000000000
1969-01-01 10.8286000000000000
1970-01-01 12.2421000000000000
1971-01-01 13.9992000000000000
1972-01-01 15.4284000000000000
1973-01-01 17.5728000000000000
1974-01-01 19.7689000000000000
1975-01-01 21.5438000000000000
1976-01-01 21.3219000000000000
1977-01-01 21.2928000000000000
1978-01-01 22.2276000000000000
1979-01-01 19.7583000000000000
1980-01-01 18.9062000000000000
1981-01-01 19.6081000000000000
1982-01-01 19.9545000000000000
1983-01-01 19.6096000000000000
1984-01-01 18.2023000000000000
1985-01-01 17.5399000000000000
1986-01-01 21.0861000000000000
1987-01-01 22.3129000000000000
1988-01-01 20.1207000000000000
1989-01-01 20.5458000000000000
1990-01-01 18.5277000000000000
1991-01-01 13.1919000000000000
1992-01-01 14.7204000000000000
1993-01-01 16.4552000000000000
1994-01-01 16.9080000000000000
1995-01-01 16.8574000000000000
1996-01-01 17.7148000000000000
1997-01-01 19.0316000000000000
1998-01-01 19.5282000000000000
1999-01-01 21.1678000000000000
2000-01-01 22.5319000000000000
2001-01-01 20.6209000000000000
2002-01-01 16.7419000000000000
2003-01-01 18.1654000000000000
2004-01-01 18.5402000000000000
2005-01-01 16.4244000000000000
2006-01-01 17.0703000000000000
2007-01-01 17.5570000000000020
2008-01-01 17.8152000000000000
2009-01-01 18.0437000000000000
2010-01-01 18.6994000000000000
2011-01-01 19.6826000000000000
2012-01-01 20.0480000000000000
2013-01-01 20.7262000000000000
2014-01-01 20.7500000000000000
2015-01-01 20.8239000000000000
2016-01-01 21.5272000000000000