Year	current US$
1970	491530003.17700225
1971	563959994.5750084
1972	688990003.8726625
1973	804809999.719262
1974	1265530004.680157
1975	1871239952.0277977
1976	1689510023.1170666
1977	2117160013.6756897
1978	2778050024.032594
1979	3852599973.4401712
1980	4669250015.020371
1981	4549970002.651214
1982	4830960004.806521
1983	4704879937.896506
1984	4588420012.474061
1985	5459229925.632477
1986	6289619968.414309
1987	7560669958.114627
1988	8521049962.99744
1989	8447229913.7115555
1990	10480720001.220703
1991	10194609941.482552
1992	11410189949.03566
1993	10290579914.093023
1994	10310319892.883307
1995	10800960118.293764
1996	8218980037.689209
1997	8028639986.038207
1998	7679369930.26734
1999	7481400024.414065
2000	7995110001.564026
2001	8510100046.157838
2002	11407200153.350834
2003	16522039883.613598
2004	16249479990.959185
2005	16411430004.11989
2006	18452829945.564278
2007	20486030153.27455
2008	23679979837.417614
2009	25143129997.253437
2010	24977449817.657482
2011	28533789930.343643
2012	26226879871.368423
2013	29207570093.154934
2014	25900260070.800804
2015	25497109967.7086
2016	25069150086.40292
2017	27881609782.218952
2018	27525489810.94363
2019	30202910114.28836