Year	current US$
1970	301791301.79130393
1971	387703105.52125406
1972	510262500.1767018
1973	793885559.971316
1974	2401403227.4408545
1975	2512773165.811741
1976	3284273986.71808
1977	3617564637.888648
1978	4052000412.700869
1979	5632962996.8264065
1980	7829165261.813985
1981	8661263763.73629
1982	7596703214.285741
1983	6467582307.692307
1984	6704395824.175824
1985	6153296456.043956
1986	5053021950.54945
1987	5446428681.318681
1988	6038187032.967032
1989	6487912087.912087
1990	7360439423.076922
1991	6883516483.516483
1992	7646153983.516483
1993	7156593653.846153
1994	7374450769.230769
1995	8137911978.021977
1996	9059340384.615385
1997	11297802115.384615
1998	10255495027.472527
1999	12393131868.131868
2000	17759890109.89011
2001	17538461538.461536
2002	19363736263.736263
2003	23533791208.791206
2004	31734065934.065933
2005	44530494505.49451
2006	60882142857.14285
2007	79712087912.0879
2008	115270054945.05495
2009	97798351648.35164
2010	125122306346.15384
2011	167775268626.37363
2012	186833502362.63736
2013	198727642967.03296
2014	206224598571.42856
2015	161739955576.92307
2016	151732181868.13187
2017	161099122225.27472
2018	183334953818.6813
2019	176371267692.30768
2020	144411363351.64835
2021	179732009560.43954
2022	235770403734.9