Year	Percent of Total
1960-01-01	2.85842051826887
1961-01-01	2.86491670717198
1962-01-01	2.86300238730535
1963-01-01	2.85439417266184
1964-01-01	2.84121324602312
1965-01-01	2.82463297314203
1966-01-01	2.84343922791065
1967-01-01	2.85681141079276
1968-01-01	2.86458868946156
1969-01-01	2.86622219130692
1970-01-01	2.86189917634745
1971-01-01	2.88433688787160
1972-01-01	2.89921438905874
1973-01-01	2.90737004465144
1974-01-01	2.90958493715012
1975-01-01	2.90652354358102
1976-01-01	2.93122663001090
1977-01-01	2.95001898862211
1978-01-01	2.96374081589490
1979-01-01	2.97259720777681
1980-01-01	2.97667734502759
1981-01-01	2.98646151272265
1982-01-01	2.98892528175247
1983-01-01	2.98576855532243
1984-01-01	2.97846884822191
1985-01-01	2.96762655680143
1986-01-01	2.98579560391816
1987-01-01	3.00013764747966
1988-01-01	3.01035479798962
1989-01-01	3.01585286778414
1990-01-01	3.01652761310786
1991-01-01	3.02585267847102
1992-01-01	3.02957704081396
1993-01-01	3.02937086369731
1994-01-01	3.02745822836638
1995-01-01	3.02551279657546
1996-01-01	3.03248138171232
1997-01-01	3.03584521625172
1998-01-01	3.03544895285750
1999-01-01	3.02985369357154
2000-01-01	3.01828928554677
2001-01-01	3.02159515781541
2002-01-01	3.01904151325404
2003-01-01	3.01279828017628
2004-01-01	3.00525467089574
2005-01-01	2.99787784424639
2006-01-01	3.01311782184783
2007-01-01	3.02599058308373
2008-01-01	3.03642692964739
2009-01-01	3.04430770563716
2010-01-01	3.05012651440875
2011-01-01	3.06072701713604
2012-01-01	3.06888869429359
2013-01-01	3.07579394724812
2014-01-01	3.08253922388031
2015-01-01	3.09005411491896
2016-01-01	3.10821091856608
2017-01-01	3.12508812432079