Annual Percent of Total
1960-01-01 57.0618251400975
1961-01-01 56.8234709765993
1962-01-01 56.7409734498744
1963-01-01 56.7847241623864
1964-01-01 56.8977173097846
1965-01-01 57.0601051410981
1966-01-01 57.2490896969075
1967-01-01 57.5052811282618
1968-01-01 57.8246998782986
1969-01-01 58.1931337696931
1970-01-01 58.5908837427724
1971-01-01 59.0415668701228
1972-01-01 59.4577214200992
1973-01-01 59.8663621754208
1974-01-01 60.3048760687131
1975-01-01 60.7864447195855
1976-01-01 61.1128007953117
1977-01-01 61.5055834000702
1978-01-01 61.9321882667856
1979-01-01 62.3198276891505
1980-01-01 62.6254041408557
1981-01-01 62.9235598099400
1982-01-01 63.1459816778054
1983-01-01 63.3114283172118
1984-01-01 63.4706542494389
1985-01-01 63.6421587701070
1986-01-01 63.7847837564615
1987-01-01 63.9527070785571
1988-01-01 64.1317926296065
1989-01-01 64.2835353171192
1990-01-01 64.3891422230761
1991-01-01 64.4140297487812
1992-01-01 64.3806866012431
1993-01-01 64.3248202972710
1994-01-01 64.3031176217668
1995-01-01 64.3398136973198
1996-01-01 64.3790486766611
1997-01-01 64.5442577986059
1998-01-01 64.7764587934441
1999-01-01 65.0005398207795
2000-01-01 65.1862285378073
2001-01-01 65.4473024704232
2002-01-01 65.6004121557921
2003-01-01 65.7099099849975
2004-01-01 65.8431350994833
2005-01-01 66.0114787832354
2006-01-01 66.2854321251268
2007-01-01 66.5792922673657
2008-01-01 66.8535530937585
2009-01-01 67.0621286611871
2010-01-01 67.1973726929897
2011-01-01 66.9962710795317
2012-01-01 66.7918998789651
2013-01-01 66.5598463744806
2014-01-01 66.2883343126539
2015-01-01 65.9729350811372
2016-01-01 65.7573223770882
2017-01-01 65.4775016789792