Year	current US$
1977	1085285984.7975051
1978	1217695603.8577712
1979	1695653795.108453
1980	1986145963.103107
1981	2420184992.725719
1982	1924655389.1521337
1983	1935126486.6142628
1984	1863517683.4735873
1985	1463589289.755555
1986	885553954.0669739
1987	1008656928.0386932
1988	1025313704.8061559
1989	990648729.5949261
1990	926275171.6615388
1991	2193936136.986921
1992	844955304.334631
1993	819068307.6119621
1994	649312978.1706216
1995	510110209.41118646
1996	712912464.6066777
1997	692174992.7142015
1998	650377727.2896779
1999	886784067.6521981
2000	815000000
2001	964000000
2002	1343000000
2003	1528000000
2004	1753000000
2005	2128000000
2006	2324000000
2007	2455500000
2008	3571700000
2009	4323000000
2010	5251400000
2011	3554800000
2012	6279200000
2013	7387500000
2014	6709100000
2015	4385700000
2016	2377100000
2017	3910300000
2018	4527700000
2019	6399600000
2020	3257600000
2021	7575500000