Year	current US$
1974	56446843.631
1975	106293321.618
1976	108540791.516
1977	144922348.016
1978	162035362.9251
1979	227324204.19889998
1980	331208715.83030003
1981	307611540.1533
1982	315740667.8021
1983	346422177.3331
1984	306567469.0643
1985	335743697.7447
1986	455240518.2932999
1987	448102512.0874001
1988	332937204.54490006
1989	320836360.12869996
1990	471568074.80980295
1991	481924812.02722293
1992	456322017.0251848
1993	430368295.3276924
1994	313456121.7112663
1995	244495721.47204462
1996	236877101.95555004
1997	245059416.4937997
1998	245465056.37582493
1999	554221159.6531171
2000	754093262.5252278
2001	663931467.5208102
2002	678709112.7078243
2003	569664945.3344688
2004	634246003.2071252
2005	678735131.9425135
2006	891132394.6328176
2007	1205292070.958046
2008	1622397838.7901068
2009	2240929162.965661
2010	3101216082.599341
2011	3055845400.9886465
2012	2931305475.844938
2013	3474903049.127318
2014	3082737582.449607
2015	3242883721.44611
2016	2720555574.575273
2017	2682714465.057581
2018	3394880391.656076
2019	3205073468.231546
2020	3199619840.5631404
2021	2556406962.100496
2022	2227559825.929089