Year Current U.S. Dollars 1967-01-01 48.2798654834855 1968-01-01 59.4675275565151 1969-01-01 57.9918001150996 1970-01-01 60.4756500013374 1971-01-01 71.1547032389973 1972-01-01 79.1574879222282 1973-01-01 90.1001936661963 1974-01-01 84.5976489245494 1975-01-01 128.1510319643730 1976-01-01 142.3768854353420 1977-01-01 156.4028270297900 1978-01-01 178.9854421613260 1979-01-01 229.3402095550980 1980-01-01 248.1889336814310 1981-01-01 212.7326099249920 1982-01-01 180.5381888700410 1983-01-01 172.0320335018020 1984-01-01 160.2528427779870 1985-01-01 177.7599163292170 1986-01-01 232.8253037331020 1987-01-01 259.1339158457790 1988-01-01 265.1403079969110 1989-01-01 262.5685977270590 1990-01-01 316.8165940902720 1991-01-01 314.8369994165370 1992-01-01 319.1914119849950 1993-01-01 309.5150779746670 1994-01-01 222.5767978916420 1995-01-01 281.7886811184590 1996-01-01 282.0813439916100 1997-01-01 266.6680469925990 1998-01-01 281.3221274350610 1999-01-01 322.5386800046670 2000-01-01 269.3483829165170 2001-01-01 306.8473237287090 2002-01-01 334.2024015901280 2003-01-01 391.7912800706870 2004-01-01 439.3572924475790 2005-01-01 487.9402556378360 2006-01-01 521.6425796264460 2007-01-01 595.6368318803230 2008-01-01 689.6784227571480 2009-01-01 697.0153123573250 2010-01-01 708.3707632474190 2011-01-01 835.0889097597480 2012-01-01 777.3476867594760 2013-01-01 803.8935756794050 2014-01-01 848.2279485480310 2015-01-01 749.9501571484360 2016-01-01 779.9448438272320 2017-01-01 824.5162257353440