Year	current US$
1970	151192813571.21127
1971	170880436505.2086
1972	191403558187.34634
1973	251948405587.67194
1974	321627421976.48584
1975	336444924029.94354
1976	371701640910.16675
1977	409055167775.0995
1978	461080919595.91064
1979	533857200627.7424
1980	634807115394.932
1981	735604797665.4692
1982	674650399533.0234
1983	577397628668.3441
1984	579629165618.5916
1985	571985877060.1925
1986	585444752981.4426
1987	613516479476.5887
1988	696174612222.5135
1989	761660646763.7822
1990	884124311343.0186
1991	978340331533.6897
1992	1076794973356.8684
1993	1261023387865.952
1994	1477478928712.1333
1995	1602553311338.3022
1996	1744812299233.0342
1997	1912164618991.2466
1998	1918178054769.0835
1999	1695176828662.6802
2000	1860120076536.4177
2001	1819087901439.687
2002	1611263344734.767
2003	1625017859691.217
2004	1858181500996.6038
2005	2237868885351.385
2006	2643639765681.4272
2007	3157054945236.712
2008	3664760277101.5786
2009	3439124804467.3916
2010	4226818072578.6494
2011	4726945940002.531
2012	4744840222116.429
2013	4907586863095.303
2014	5010134892490.567
2015	4267588721556.6226
2016	4141975069184.0996
2017	4627962065361.727
2018	4466058679808.633
2019	4418444796791.576
2020	3721779749080.1055
2021	4164974472918.267