Year	current US$
1970	1598734001.77488
1971	1875486231.36198
1972	2217450611.19762
1973	2970721597.41709
1974	3963551365.41056
1975	4959355265.50958
1976	5459291264.4794
1977	6035694926.34051
1978	6557247143.44663
1979	7697980679.44244
1980	9504311103.86069
1981	9366068745.63861
1982	9337638988.38559
1983	9123863165.99402
1984	9394964110.64899
1985	9968066330.96316
1986	13116368011.2189
1987	16643840028.5324
1988	19907355275.106
1989	21922413806.2737
1990	27766312184.8846
1991	26778066417.3838
1992	23647692840.9418
1993	18606814302.5023
1994	20534071843.4472
1995	24232026146.8287
1996	23703080502.7445
1997	21958538539.5946
1998	22516688917.3999
1999	22787366234.9458
2000	21340067946.9694
2001	22079059112.1789
2002	24026082794.1143
2003	29579844257.6052
2004	34127703960.6696
2005	36083594256.599
2006	38207872194.5369
2007	44491199061.9845
2008	51224942215.6549
2009	49506407284.9292
2010	46996655825.5325
2011	51130692310.8039
2012	49475926966.0621
2013	52228241880.7082
2014	52627230064.0442
2015	44423786623.2465
2016	45085270694.2927
2017	47144984530.8793
2018	51183749402.4748
2019	50776005340.6172
2020	52935078679.4975
2021	56532621337.9294