Year	current US$
1970	2461540.10807784
1971	3239093.95973154
1972	3451021.2046312
1973	5575216.13832854
1974	6460927.15231789
1975	8514387.52614038
1976	10590271.3891444
1977	10767019.3192272
1978	15107635.6945722
1979	15114014.2517815
1980	22233179.2501284
1981	26084102.5641026
1982	27106361.3004237
1983	28464739.9694821
1984	21297549.7864841
1985	15550631.8032934
1986	25270416.892779
1987	22275263.3110488
1988	25112679.3490213
1989	28527139.2076867
1990	40395040.1510632
1991	45558846.7022157
1992	62392730.8732183
1993	58381635.4010465
1994	66412328.0669145
1995	83026604.8909599
1996	80638986.691847
1997	93837518.2508677
1998	89847327.9641617
1999	94892405.3163104
2000	81285102.9179516
2001	89340118.7394732
2002	73912536.2907588
2003	143643447.042183
2004	163550337.678804
2005	189519948.239587
2006	207961890.427527
2007	222733698.583472
2008	232796393.378686
2009	215183022.004858
2010	259584282.46486
2011	268510956.098808
2012	241429651.508505
2013	217519611.357376
2014	208170782.769663
2015	192878530.116916
2016	167142827.163991
2017	173356702.180994
2018	179573771.257046
2019	174098834.193736
2020	157405499.527582
2021	178295268.200053