Year	current US$
1978	54237456.9280442
1979	64497433.007227756
1980	103502678.98413973
1981	70731598.49406941
1982	52658766.709015794
1983	71058550.0678155
1984	66029430.9687856
1985	55468627.6598251
1986	70397298.31277311
1987	75092360.8750541
1988	66305583.690518096
1989	72725380.6162487
1990	65377532.4151784
1991	64869024.573948495
1992	53647298.3285975
1993	40259556.9659277
1994	48630712.6205281
1995	61474700.5253842
1996	59991895.6179159
1997	85473047.5214899
1998	111773542.92791286
1999	139382152.11900938
2000	130233682.2329366
2001	137023916.000159
2002	158512186.01577964
2003	185032723.30111718
2004	183563471.7627903
2005	206540109.5826073
2006	251519055.9926409
2007	138116052.94010377
2008	177813884.8266258
2009	404487901.7198342
2010	389028359.2522079
2011	522081098.11388123
2012	286849832.1720924
2013	558257157.2933409
2014	620549775.0835924
2015	386726109.75083447
2016	226109906.1401068
2019	259025682.37487617
2020	225700414.85004473
2021	225015505.2153803