Year	current US$
1971	1249999.994412064
1972	3759999.9066442233
1973	5199999.973177906
1974	9570000.058040025
1975	15710000.479593897
1976	22679999.89166856
1977	19199999.95268882
1978	18570000.15489757
1979	24919999.603182048
1980	34419999.83601274
1981	36470000.3750622
1982	36910000.02808868
1983	49560000.469908185
1984	53620000.01594419
1985	60350001.58660109
1986	94940001.37038521
1987	126079999.91811815
1988	192680001.67235726
1989	197619999.37146914
1990	194610000.40546045
1991	197440001.4635177
1992	147759999.91782004
1993	60569999.62776903
1994	75720000.71406375
1995	66330000.36142769
1996	65369998.95423651
1997	54030000.16510487
1998	67969999.38413492
1999	64809999.95954333
2000	65570000.60006975
2001	70549999.89829963
2002	78309999.96140587
2003	99219999.88704917
2004	124430000.40017065
2005	137919998.51353467
2006	161500000.6705522
2007	207580000.34652653
2008	232240002.03236935
2009	267750003.79979613
2010	283189997.29305506
2011	274809999.03380865
2012	268040004.64454302
2013	291289999.5502084
2014	325060000.33393496
2015	235730000.90382996
2016	195429999.8749049
2017	165719999.467954
2018	132860001.83038418
2019	177750000.27753413
2020	210040000.3511459
2021	212619998.49788857
2022	176199998.65442517