Year	constant 2015 US$
1971	8765496587.242935
1972	9257235410.722908
1973	9954006339.408674
1974	9788277512.957554
1975	10389647777.86974
1976	11426959187.043705
1977	13243411851.028152
1978	13659932501.258726
1979	13803047372.141539
1980	13663739106.446096
1981	11661434719.926266
1982	10735481548.000408
1983	11899729784.397766
1984	13330066186.610518
1985	13813701141.231602
1986	15551242441.342262
1987	15260568077.874533
1988	15605084149.354269
1989	16020523450.105059
1990	16850014389.44996
1991	17304847934.322243
1992	19151039609.313137
1993	20667287945.969963
1994	22220077668.93951
1995	23081225227.88558
1996	23140105807.15694
1997	24854667691.00088
1998	26629708486.648087
1999	26544677205.62476
2000	27079282378.94663
2001	28064979467.10457
2002	28751464599.471786
2003	29865045916.85667
2004	30963083863.3113
2005	31875526817.21666
2006	34364527254.65362
2007	37125935843.357956
2008	38664203794.50295
2009	38533746820.71332
2010	41365494776.351685
2011	42849570198.04941
2012	45512113657.35154
2013	46625634344.21155
2014	48316622208.00658
2015	51139413619.9991
2016	53848586498.77851
2017	55044455693.05045
2018	56014936283.676
2019	57527098696.06714
2020	54822075892.084595
2021	57240496437.94557