Year	current US$
1970	6913514399.94736
1971	7621339972.17784
1972	8409919379.95281
1973	10116998504.7794
1974	13495154056.0858
1975	14906953564.7161
1976	15717771111.0371
1977	17008830453.1176
1978	17851489830.3048
1979	20618917784.0914
1980	22976534862.5404
1981	27039346782.3191
1982	31245116326.0731
1983	28097751650.3911
1984	30394654504.2069
1985	29402068909.2224
1986	31241245908.2039
1987	31816580239.9173
1988	38865242209.3524
1989	49415515620.0636
1990	52715919029.3027
1991	55853577786.5725
1992	56120866044.8933
1993	54107306661.0899
1994	54811164043.6113
1995	60912972068.5203
1996	64651379827.4283
1997	71348278818.4248
1998	65828256972.064
1999	63794486456.9297
2000	69588567638.8117
2001	62924961544.9934
2002	65096121511.4552
2003	75724687756.3844
2004	100396929005.906
2005	114037875959.989
2006	122582745686.376
2007	138894889696.039
2008	172880348709.556
2009	154124412363.896
2010	183914885229.059
2011	221057357724.812
2012	252264055811.102
2013	264556496888.917
2014	259415594196.87
2015	246499028079.683
2016	213077521821.036
2017	232937918802.971
2018	247167982080.903
2019	246181423876.979
2020	230355930961.924
2021	265793432911.397