Year	current US$
1976	327170818.03929496
1977	397136019.69213486
1978	499896564.7322244
1979	573706093.8081594
1980	593808772.4932889
1981	597434667.6824213
1982	554423755.236812
1983	559703405.0332302
1984	516364351.497895
1985	498689232.81314284
1986	649470331.918994
1987	867511395.4051248
1988	1011629572.7141312
1989	1061655564.9669926
1990	1221989459.1214821
1991	1344099764.7120156
1992	1532647414.3377125
1993	1580753500.745834
1994	1792982693.5050936
1995	2062188300.1443033
1996	2279846815.8158755
1997	2203037423.011106
1998	2191674100.193184
1999	2423179113.411807
2000	2610807568.645537
2001	2594579820.74243
2002	2763366924.771377
2003	3336872466.419786
2004	3783118955.1058335
2005	3863905184.095881
2006	4347127183.754216
2007	5044348702.048717
2008	6155168071.459164
2009	5681230796.187711
2010	6288314860.773639
2011	7279013584.291758
2012	7423367981.840383
2013	7852681956.283498
2014	8490962446.5618515
2015	7868510156.403769
2016	8336249376.545413
2017	9132370696.695448
2018	9858727427.035694
2019	9732669021.794483
2020	7762917633.24984
2021	7686054283.6279955
2022	8525064349.172274
2023	9304833684.85698