Year	current US$
1970	71058808.7698675
1971	81178972.4503249
1972	72869071.6353411
1973	63788093.4610341
1974	230501211.463308
1975	472098153.597308
1976	850208005.317482
1977	1253146097.8206
1978	1571629690.5009
1979	4055054657.36396
1980	5481087275.02938
1981	4664974056.02069
1982	4329320536.50414
1983	4712285808.39946
1984	5377836669.63165
1985	5838499600.20712
1986	2538942957.83495
1987	3866034998.51651
1988	3115244985.21426
1989	4450620458.36059
1990	6147073376.43698
1991	3750198000.91207
1992	3994898114.66865
1993	3986084442.80167
1994	3476196912.8259
1995	3875427013.0221
1996	4828024930.54537
1997	4058650788.13595
1998	2495623828.40509
1999	4011569343.58718
2000	5352805889.86715
2001	4267485295.25097
2002	4294321099.16389
2003	5142983026.21389
2004	6219558989.94859
2005	8949808691.98512
2006	11045362578.7813
2007	12002679463.5766
2008	16899475808.2629
2009	10663453665.3531
2010	13622613954.9423
2011	19169947079.1013
2012	19689926059.2098
2013	19202797378.8207
2014	17700648356.5862
2015	8918001563.31172
2016	6785043192.26689
2017	8660843873.43967
2018	13188560151.6116
2019	12008590973.5216
2020	7668974428.98293
2021	13986574474.3648