Year	2010 U.S. Dollars
1960-01-01	601.852814886680
1961-01-01	621.042370311860
1962-01-01	587.439559601599
1963-01-01	572.581800118993
1964-01-01	573.373813983400
1965-01-01	567.462409847431
1966-01-01	559.565075043678
1967-01-01	573.560370447375
1968-01-01	569.440083466322
1969-01-01	597.274712754411
1970-01-01	599.012721569322
1971-01-01	594.122924885536
1972-01-01	582.950534531513
1973-01-01	582.761473032179
1974-01-01	607.569355493002
1975-01-01	597.374675236425
1976-01-01	616.074773550258
1977-01-01	624.963005756954
1978-01-01	617.369623991334
1979-01-01	586.862990389784
1980-01-01	545.519889876797
1981-01-01	521.766207875215
1982-01-01	545.284255719180
1983-01-01	486.043589953187
1984-01-01	517.058098933563
1985-01-01	523.405088954176
1986-01-01	529.518756294693
1987-01-01	492.721785163911
1988-01-01	490.990615177147
1989-01-01	490.167075797041
1990-01-01	468.690923780549
1991-01-01	454.529321082811
1992-01-01	414.176346303553
1993-01-01	404.407165103460
1994-01-01	412.999862072528
1995-01-01	431.498901292062
1996-01-01	404.225167957660
1997-01-01	415.787533649255
1998-01-01	425.639907439052
1999-01-01	431.472771560185
2000-01-01	411.938394336566
2001-01-01	421.659423950813
2002-01-01	428.477457458053
2003-01-01	397.811539326012
2004-01-01	414.030452086432
2005-01-01	410.415055276018
2006-01-01	422.438907835757
2007-01-01	434.250704408774
2008-01-01	436.073948818081
2009-01-01	437.601617257694
2010-01-01	446.443687795492
2011-01-01	458.333018044580
2012-01-01	475.667641494253
2013-01-01	300.479742133186
2014-01-01	302.546530776540
2015-01-01	314.926685576165
2016-01-01	325.720465732059
2017-01-01	335.026085592608