Annual Percent of Total
1960-01-01 3.72516158960724
1961-01-01 3.75363113997821
1962-01-01 3.76126381927794
1963-01-01 3.75398651632595
1964-01-01 3.73950161552064
1965-01-01 3.72103743839633
1966-01-01 3.76664750367308
1967-01-01 3.81038212342903
1968-01-01 3.85068645363535
1969-01-01 3.88540410802168
1970-01-01 3.91490144157325
1971-01-01 3.97097469798374
1972-01-01 4.02002548044758
1973-01-01 4.06373350935712
1974-01-01 4.10530610477709
1975-01-01 4.14672027525564
1976-01-01 4.21523306198240
1977-01-01 4.28105500255802
1978-01-01 4.34089829091543
1979-01-01 4.38916762944441
1980-01-01 4.42371990481193
1981-01-01 4.46950517629613
1982-01-01 4.49831076648406
1983-01-01 4.51633862308068
1984-01-01 4.53075650155094
1985-01-01 4.54551248561523
1986-01-01 4.57796725647918
1987-01-01 4.60675012883652
1988-01-01 4.63533477059985
1989-01-01 4.66859812010355
1990-01-01 4.70855620689201
1991-01-01 4.77241669481018
1992-01-01 4.84474381825105
1993-01-01 4.91989157332742
1994-01-01 4.98939352713676
1995-01-01 5.05044431515491
1996-01-01 5.13929258450142
1997-01-01 5.21122655700537
1998-01-01 5.27442377720549
1999-01-01 5.33871036085848
2000-01-01 5.40836193425343
2001-01-01 5.49854123417111
2002-01-01 5.58946249218556
2003-01-01 5.67627346721771
2004-01-01 5.74862280186587
2005-01-01 5.80302486439873
2006-01-01 5.86651411190886
2007-01-01 5.91639119810505
2008-01-01 5.96000593729493
2009-01-01 6.00670559059689
2010-01-01 6.06189677606838
2011-01-01 6.14249665591250
2012-01-01 6.22464225847345
2013-01-01 6.31645488767240
2014-01-01 6.42949264776752
2015-01-01 6.57101023512049
2016-01-01 6.75326584820298
2017-01-01 6.95841265431691