Year	Current U.S. Dollars
1980-01-01	293.243766479913
1981-01-01	289.191349231072
1982-01-01	280.617220973595
1983-01-01	256.339051301639
1984-01-01	248.336897771915
1985-01-01	270.363177738753
1986-01-01	285.104623520085
1987-01-01	304.766828197569
1988-01-01	305.679829207479
1989-01-01	304.095188459982
1990-01-01	307.148685697813
1991-01-01	301.300729295512
1992-01-01	265.135333680013
1993-01-01	257.180999186971
1994-01-01	233.411909807466
1995-01-01	259.020686019843
1996-01-01	277.780467015145
1997-01-01	286.600526575931
1998-01-01	281.142693595678
1999-01-01	277.259742019610
2000-01-01	306.767849513313
2001-01-01	284.636111989029
2002-01-01	299.523351820088
2003-01-01	330.573524815751
2004-01-01	370.989873833837
2005-01-01	424.490994681453
2006-01-01	487.746280897913
2007-01-01	579.643087068929
2008-01-01	705.746937393186
2009-01-01	703.251195404408
2010-01-01	779.383568243235
2011-01-01	871.917779762747
2012-01-01	904.201126709466
2013-01-01	958.896926432956
2014-01-01	1011.208978087140
2015-01-01	970.423910856363
2016-01-01	949.237733488829
2017-01-01	1060.007788898140