Year	current US$
1970	200949998.69726598
1971	230140000.78663245
1972	267140001.22994193
1973	326719999.2854148
1974	479369998.49416333
1975	588470002.0086019
1976	815990004.077553
1977	755400000.7454305
1978	1057259997.6677455
1979	1152679996.613413
1980	1442640002.0085268
1981	1491829994.885251
1982	1367409995.1125677
1983	1396600005.4255137
1984	1349069991.0800912
1985	1224739998.8062677
1986	1540060006.1193109
1987	1697549989.994615
1988	1668060007.1735687
1989	1890570003.3195317
1990	2502299995.191396
1991	2225050001.084804
1992	2056900007.7638774
1993	2192609991.8577824
1994	2491730011.686682
1995	2359070015.687496
1996	2307690023.973584
1997	2086400006.473064
1998	1880650009.0360641
1999	1704810014.4267092
2000	1620760010.7192988
2001	1617289987.6236906
2002	1774090021.6102605
2003	1786729997.7242956
2004	1948869993.0161247
2005	2085429982.066156
2006	2279279974.5798116
2007	2907799982.54776
2008	3736150009.6321106
2009	3597200010.299683
2010	3957520000.4577637
2011	3845949978.8284297
2012	3735980009.7942343
2013	3766680026.8888474
2014	3213590000.3910046
2015	2801969990.491868
2016	2663570009.8872185
2017	3258539996.6239934
2018	3522149985.790254
2019	3591990024.5666485
2020	4976689963.340758
2021	4911049954.414369