Year	current US$
1977	481900000
1978	428700000
1979	514500000
1980	825200000
1981	1021000000
1982	1028000000
1983	892000000
1984	809900000
1985	851000000
1986	925520000
1987	1066670000
1988	1078110000
1989	1101400000
1990	1076000000
1991	1160000000
1992	1339000000
1993	1308186062.67282
1994	1462325926.4060001
1995	1792014039.09937
1996	1998882243.63756
1997	2243052144.50321
1998	2320547331.197
1999	2119077894.02069
2000	2169775168.57975
2001	2278737631.89292
2002	2336197189.54123
2003	2499849791.4337397
2004	2611442422.2738657
2005	3019791868.245417
2006	3276963694.833633
2007	4224409422.071375
2008	5576908580.27919
2009	4671483478.789067
2010	5899850410.201125
2011	6359204771.10989
2012	7301114488.913874
2013	7650411042.017941
2014	7786330253.742016
2015	8120934232.045086
2016	8186402689.474148
2017	8597090454.61733
2018	9546908311.174301
2019	10409533332.834156
2020	7420539917.544257
2021	10320515009.7598
2022	13246879112.94946
2023	12952721263.983515