Year	current US$
1970	6429685.46268673
1971	6891113.83399337
1972	7887839.01479889
1973	13230860.9199637
1974	13187242.6347772
1975	18719708.1588857
1976	17456007.9853665
1977	21766507.2899382
1978	26296141.302653
1979	42612333.0120642
1980	45330143.8150416
1981	41644264.3026103
1982	71651924.463209
1983	34474400.6042512
1984	22289170.8020686
1985	17618131.3957983
1986	23934897.1364226
1987	26020943.1710216
1988	24600144.9281742
1989	27949346.6631568
1990	44593788.9146253
1991	49281239.9676915
1992	51052985.5908797
1993	47958195.3188704
1994	48961599.4319948
1995	64098078.5598801
1996	52623431.9882244
1997	57989819.3257629
1998	50392246.1812832
1999	21928008.8716569
2000	23769576.2501678
2001	23459257.1399955
2002	37588265.5207638
2003	37473089.2389919
2004	33170664.6749231
2005	36263154.6319817
2006	50214336.0769936
2007	51599796.2734522
2008	49159550.6219127
2009	53602897.7847468
2010	72865282.2794025
2011	67709198.091006
2012	65299522.7821438
2013	79210635.083047
2014	85872208.2553126
2015	79607687.3348413
2016	90492454.4638636
2017	89214447.8387959
2018	77464988.4302741
2019	68589893.4276754
2020	79553777.8520834
2021	68828464.4023332