Year	current US$
1977	6173528747.646205
1978	6351184541.479758
1979	7196904128.16395
1980	10288776389.575768
1981	9843003251.457266
1982	8073081517.550621
1983	6867616834.282622
1984	5701593347.629147
1985	6478986042.465666
1986	6040082925.148784
1987	5856462273.120649
1988	5818655919.252601
1989	6469537875.482141
1990	8029599643.896462
1991	8575235813.636623
1992	7690057255.046138
1993	8663852265.864073
1994	8490237971.122058
1995	6795422897.121528
1996	8077652320.036081
1997	7486043003.347493
1998	7510218398.171237
1999	10035952692.955956
2000	9742130264.079502
2001	11692312879.030338
2002	12434577366.725128
2003	14412310262.864325
2004	16000860272.988646
2005	17669335081.246113
2006	26241655680.39464
2007	32607096196.31712
2008	43612361732.391945
2009	36327881119.58208
2010	41249832783.22425
2011	47463926978.51991
2012	47909304038.26473
2013	48204743596.07573
2014	51910222121.044014
2015	46123460539.019295
2016	37523721486.96706
2017	48684071421.5182
2018	65567863360.88841
2019	77876636172.91975
2020	55437456889.33567
2021	54236758962.19887
2022	60484969911.777885