Year	current US$
1970	10510000.042617314
1971	9360000.03665686
1972	24200000.073760748
1973	22899999.666959
1974	18639999.985694874
1975	23890000.307932515
1976	23880000.222474333
1977	30090000.0706315
1978	38620000.02339482
1979	32109999.98077751
1980	27250000.296160582
1981	34460000.28774146
1982	34070000.05245207
1983	45609999.33071435
1984	56550000.96932059
1985	56209999.002516285
1986	62939999.72194436
1987	72889999.38033526
1988	90349998.07365237
1989	97219999.97086819
1990	84569999.8494237
1991	76419999.2474169
1992	62259999.35343862
1993	48670000.21412971
1994	40330000.104382604
1995	26629999.808967106
1996	20219999.806955446
1997	22040000.407025214
1998	14079999.824985866
1999	17439999.956637617
2000	15139999.782666571
2001	32970000.389963422
2002	23129999.91886318
2003	34520000.42423605
2004	37209999.55944716
2005	74390000.29861924
2006	29210000.008344647
2007	74109999.95470046
2008	23450000.025331978
2009	46780000.24147334
2010	16729999.965056773
2011	34570000.084117055
2012	14670000.066980712
2013	29389999.788254455
2014	18740000.00022352
2015	15320000.367239118
2016	13029999.939724801
2017	10290000.136941668
2018	18439999.61577356
2019	15389999.78825449
2020	22759999.871253967
2021	24409999.921917904
2022	42930000.50261621