Year	current US$
1970	6365418134.19797
1971	6576653252.12913
1972	7614172676.02786
1973	8186717335.26648
1974	9673426779.14112
1975	10308152241.4471
1976	12622281947.2617
1977	13304622457.922
1978	14550294545.4545
1979	15187037951.1695
1980	16577621618.2005
1981	18413208774.7102
1982	19138171354.4622
1983	22233844530.9965
1984	22123462280.905
1985	21299670450.3845
1986	21608861460.9572
1987	25606705128.2051
1988	29573364751.7673
1989	32314858108.1081
1990	33328376756.942
1991	36125928253.4695
1992	37823291139.2405
1993	37477933493.5276
1994	39701249267.7211
1995	39200809530.7491
1996	42108346514.938
1997	43837479365.3322
1998	33465401138.4852
1999	35963486756.9041
2000	38936726194.3446
2001	36268051394.6281
2002	36790541800.8557
2003	42466028475.4774
2004	47824932062.572
2005	53549737415.4151
2006	60046231488.0112
2007	66426500512.0564
2008	67021594189.3157
2009	61873792669.0578
2010	79268993782.5595
2011	86741071024.6587
2012	82862154793.9442
2013	78154670976.4334
2014	80726951226.6161
2015	68047557529.1186
2016	68362924865.2296
2017	74425119996.6159
2018	77027754104.1718
2019	77023158507.5124
2020	72876039708.9169
2021	88424162323.2619