Year	current US$
1975	13435004.581751538
1976	8090553.586704142
1977	11561654.468840096
1978	11967036.740299873
1979	11648334.451151352
1980	16011159.189250741
1981	15794070.328660078
1982	17123440.511208035
1983	11355855.855855854
1984	17095217.200526547
1985	18094839.025071584
1986	17534759.35828877
1987	25256966.811370958
1988	24250192.258395284
1989	26696066.746126343
1990	38464269.177342184
1991	30278420.48434367
1992	32405166.654294413
1993	27551300.578034684
1994	33681260.415088624
1995	35422928.63325203
1996	44685445.24717916
1997	44847645.42936288
1998	37511930.29490617
1999	30748249.720264833
2000	29228989.652305003
2001	23631295.16344037
2002	33366012.27731257
2003	39211497.678892866
2004	45131184.73209454
2005	46714183.63424833
2006	42549940.01722327
2007	36478873.66140934
2008	54960236.87417007
2009	42554578.85082117
2010	45862989.070168555
2011	67310460.3186473
2012	80356026.0824623
2013	91729424.78628978
2014	74648031.09851818
2015	74117113.04637814
2016	91160760.38700281
2017	102005272.05552714
2018	104684873.26008394
2019	112507581.69969164
2020	99820487.61399166
2021	58759874.70998698