Year	2010 U.S. Dollars
1960-01-01	331.578006681623
1961-01-01	310.690940192321
1962-01-01	339.723433590129
1963-01-01	301.190711398093
1964-01-01	258.748146491040
1965-01-01	270.786381147636
1966-01-01	282.244584994894
1967-01-01	293.004330536660
1968-01-01	303.870289594505
1969-01-01	326.818028175520
1970-01-01	335.917593136647
1971-01-01	329.969887884551
1972-01-01	321.257278650906
1973-01-01	322.693670053253
1974-01-01	317.605867996291
1975-01-01	301.457043239048
1976-01-01	349.012422321877
1977-01-01	344.628314145040
1978-01-01	363.940216020364
1979-01-01	393.670988565027
1980-01-01	414.506663575220
1981-01-01	422.706560223531
1982-01-01	416.696845489112
1983-01-01	427.272048945650
1984-01-01	394.663369635409
1985-01-01	396.002397672858
1986-01-01	398.927803116015
1987-01-01	379.609978389494
1988-01-01	379.870179663177
1989-01-01	369.951404261602
1990-01-01	360.088645913135
1991-01-01	360.196061765804
1992-01-01	401.259886315116
1993-01-01	392.247940135663
1994-01-01	204.731667459484
1995-01-01	280.443272664144
1996-01-01	306.514140035293
1997-01-01	327.178507427396
1998-01-01	329.049186867712
1999-01-01	319.157040060837
2000-01-01	327.236038941254
2001-01-01	342.056776498741
2002-01-01	377.801246627099
2003-01-01	379.710112336393
2004-01-01	401.600793349623
2005-01-01	430.796705062065
2006-01-01	459.565954561249
2007-01-01	482.037013559094
2008-01-01	521.445417840325
2009-01-01	539.074308376266
2010-01-01	563.401345326449
2011-01-01	592.989428299370
2012-01-01	627.968476614943
2013-01-01	640.813758392639
2014-01-01	672.639641782578
2015-01-01	714.393932013572
2016-01-01	738.830185687619
2017-01-01	765.224557813422