Year	current US$
1971	19817049998.3615
1972	20585177154.051
1973	28109239194.95
1974	34545826605.4651
1975	34873658459.6274
1976	32682366289.2752
1977	35570269054.8446
1978	40459421418.5563
1979	48382608088.8574
1980	66894792932.2513
1981	70441071224.2186
1982	64248640405.2741
1983	72237952523.7511
1984	65855357224.8151
1985	47184673564.3444
1986	53877512162.8823
1987	73075880359.0113
1988	79677814587.8429
1989	83315002806.017
1990	97959729216.0107
1991	107454600832.597
1992	118924532521.794
1993	120440786353.661
1994	126083665462.661
1995	142277234694.644
1996	134806668745.649
1997	140458314928.722
1998	127123725365.502
1999	125775481834.557
2000	125268249716.005
2001	109995972981.918
2002	106116993827.102
2003	164253024947.892
2004	213479648555.331
2005	241607385178.952
2006	252244266956.553
2007	269519968357.212
2008	243666302859.791
2009	269132297089.488
2010	337741371297.597
2011	367431644394.668
2012	350323870343.88
2013	322009996355.505
2014	309055651991.273
2015	286512572884.149
2016	264150916540.265
2017	311853811186.24
2018	329150364059.474
2019	316519190735.271
2020	273913960042.284
2021	339552672450.42