Year	2010 U.S. Dollars
1975-01-01	102479.1890343930
1976-01-01	102319.7275141630
1977-01-01	107452.1803833600
1978-01-01	92822.3616039068
1979-01-01	100480.4367642310
1980-01-01	113682.0382446140
1981-01-01	110644.5515647040
1982-01-01	97254.0615227025
1983-01-01	87942.9026877669
1984-01-01	86936.8490892882
1985-01-01	79439.2866285564
1986-01-01	63832.1312517683
1987-01-01	62248.9287498876
1988-01-01	57136.0525999693
1989-01-01	60523.2281305091
1990-01-01	67606.9169233671
1991-01-01	64386.0911209448
1992-01-01	62821.1576886423
1993-01-01	60133.1929557377
1994-01-01	60932.2776417447
1995-01-01	61818.2337791354
1996-01-01	62294.1289696621
1997-01-01	64176.4841609176
1998-01-01	61231.2297229213
1999-01-01	59845.0370389603
2000-01-01	62833.2510712003
2001-01-01	60434.6739832762
2002-01-01	58707.0071667036
2003-01-01	59867.2899395864
2004-01-01	60042.5973540766
2005-01-01	56199.0292674233
2006-01-01	53926.5970978141
2007-01-01	48260.0109053853
2008-01-01	43658.9447787703
2009-01-01	37203.3979933390
2010-01-01	35037.8926731322
2011-01-01	35730.3293487800
2012-01-01	36376.4536782084
2013-01-01	37765.7168368805
2014-01-01	39146.1120872366
2015-01-01	40753.8863426086
2016-01-01	41449.6814172376
2017-01-01	41197.1687786643