Year	current US$
1970	635262876.42274
1971	753357927.975172
1972	809172330.378557
1973	1072753180.47799
1974	1235504248.96655
1975	1463376384.66395
1976	1839130529.82681
1977	1987111906.64037
1978	2527098411.0028
1979	2699265266.67246
1980	3126316002.59152
1981	3023699973.86532
1982	3095022001.85931
1983	2992941724.68615
1984	2961871837.28481
1985	3086087563.39273
1986	3873754175.28771
1987	4831566011.13173
1988	5271096823.69188
1989	5695054964.15381
1990	6519311788.10486
1991	6844919711.85736
1992	7557468501.08619
1993	8838721613.73532
1994	9500764565.85808
1995	10813251673.191
1996	10993125988.4027
1997	10537214352.3623
1998	9906061930.82686
1999	10119615755.4621
2000	9892125132.25923
2001	10913085723.5006
2002	13449545629.9005
2003	15512871274.8228
2004	17729790202.9432
2005	19548524920.4502
2006	20301067282.0545
2007	23983561082.9623
2008	26646000904.2553
2009	24779476424.4708
2010	26437876023.7143
2011	29680658411.0293
2012	34991834413.4078
2013	34830688270.3469
2014	34231022794.434
2015	25615279573.8743
2016	25942438226.4374
2017	27430667260.4463
2018	29135946831.6093
2019	28154926854.6007
2020	25408638912.0883
2021	33946846000.1084