Annual Percent of Total
1960-01-01 3.88204592648249
1961-01-01 3.91026463123573
1962-01-01 3.89412109337870
1963-01-01 3.85045695416751
1964-01-01 3.79910872731881
1965-01-01 3.74649946853946
1966-01-01 3.80219339957294
1967-01-01 3.86176515154791
1968-01-01 3.91889266809240
1969-01-01 3.97173623737704
1970-01-01 4.01332241766041
1971-01-01 4.07840022617715
1972-01-01 4.13796654460101
1973-01-01 4.19328064888409
1974-01-01 4.25417776239830
1975-01-01 4.31997067399818
1976-01-01 4.42298624331057
1977-01-01 4.52976157276979
1978-01-01 4.63821185692980
1979-01-01 4.74468002397062
1980-01-01 4.84679179889705
1981-01-01 4.97062420597183
1982-01-01 5.08093930405048
1983-01-01 5.18091846875191
1984-01-01 5.27284650866273
1985-01-01 5.35798873758350
1986-01-01 5.43933829818147
1987-01-01 5.51164766868954
1988-01-01 5.58075944211913
1989-01-01 5.65527161708197
1990-01-01 5.74138907600872
1991-01-01 5.83456978355126
1992-01-01 5.94366747184702
1993-01-01 6.06446931281233
1994-01-01 6.19038341789351
1995-01-01 6.31858749736776
1996-01-01 6.48552802820132
1997-01-01 6.63977863815105
1998-01-01 6.78796792348316
1999-01-01 6.93696825235191
2000-01-01 7.08959601821964
2001-01-01 7.24952478037096
2002-01-01 7.40806220851942
2003-01-01 7.56281351592174
2004-01-01 7.70651174753674
2005-01-01 7.83928273987464
2006-01-01 7.97969884332689
2007-01-01 8.11244122703877
2008-01-01 8.24466564913878
2009-01-01 8.38628228763512
2010-01-01 8.54642626464052
2011-01-01 8.72914989763561
2012-01-01 8.92125672992317
2013-01-01 9.13506745597183
2014-01-01 9.38844016021686
2015-01-01 9.69110035790211
2016-01-01 10.04380777357390
2017-01-01 10.43960059313270