Year	constant 2015 US$
1977	82921802.14591537
1978	92055978.593861
1979	61293846.85402914
1980	60030298.62393366
1981	71965650.25539863
1982	73195655.62154596
1983	73281994.4615704
1984	77790098.40191016
1985	73656897.88824886
1986	86604533.33163828
1987	90028159.2373404
1988	95944006.74034329
1989	80844330.59470266
1990	88082253.31778556
1991	87440542.88645153
1992	89041820.31791124
1993	88927871.73664631
1994	84795736.34235515
1995	77119200.3413498
1996	81641159.82944201
1997	79967914.87297288
1998	78078767.34147547
1999	75973717.23494978
2000	75068125.87858118
2001	70995963.42179787
2002	69304726.58407637
2003	65712347.6273559
2004	65784315.152365334
2005	65544423.40233392
2006	66360055.352440745
2007	61106426.02675271
2008	69352704.93408267
2009	70558160.97799054
2010	64710799.570974745
2011	69442664.34034444
2012	74870215.18480526
2013	78300667.21025452
2014	78180721.33523881
2015	76003703.7037037
2016	83080510.3296305
2017	67253652.12130776
2018	48841960.30639651
2019	59409191.89528043
2020	61328325.89553177
2021	75673852.54741052
2022	75158085.28484297
2023	73682751.02214976