Year	current US$
1970	19092411.0893307
1971	19406328.7594511
1972	17601232.1478578
1973	21203286.6707243
1974	35545482.7693262
1975	42166979.3621013
1976	49719277.1084337
1977	67867597.9350138
1978	86802169.8298428
1979	138956811.188811
1980	165733593.152064
1981	178840012.106538
1982	181402761.41844
1983	218505744.973836
1984	215870305.3316
1985	245260745.058287
1986	193794737.428571
1987	209111633.677991
1988	238794047.555437
1989	221457289.418726
1990	228817943.649239
1991	242888597.738288
1992	253109443.954104
1993	307170728.820898
1994	343436735.651925
1995	393401255.707763
1996	417470521.861777
1997	380015578.561354
1998	436152840.026936
1999	339429972.416336
2000	358168365.455224
2001	376635050.365754
2002	391883287.72064
2003	412887632.001765
2004	460059692.82533
2005	500942127.067271
2006	591563431.891897
2007	663613671.914188
2008	851375827.308056
2009	904077876.707686
2010	960273531.227937
2011	1025729816.04213
2012	1076123196.23015
2013	1153913833.93465
2014	1209763970.67346
2015	1243459601.93907
2016	1265763266.03314
2017	1267662529.87851
2018	1159955478.41342
2019	1175995917.66025
2020	1201781761.84934
2021	1293170980.49604