Year	current US$
1977	11650000.17359852
1980	20700000.28610231
1981	13969999.829307195
1982	20040000.218898118
1983	25600000.04246836
1984	32630000.993609425
1985	21019999.787211467
1986	14929999.548941849
1987	13619999.855756763
1988	16250000.320374971
1989	18089999.69065192
1990	27729999.691247966
1991	19170000.389218315
1992	18079999.774694417
1993	14610000.342130667
1994	27749999.800696995
1995	30569999.89785256
1996	36770000.219345115
1997	24880000.660195947
1998	29470000.714063648
1999	25580000.102519985
2000	19090000.27179718
2001	36500000.23841859
2002	42279999.73297126
2003	43839999.422431
2004	29740000.188350633
2005	37139999.98569487
2006	37460000.038146995
2007	37979999.8402596
2008	34550000.19073487
2009	39480000.376701385
2010	44300000.637769744
2011	43880000.74028969
2012	40116598.48690029
2013	34656486.27281189
2014	37388472.4974632
2015	37078668.32613948
2016	30414829.254150383
2017	20908214.28596975
2018	20430310.01091003
2019	26537316.471338283
2020	29676019.430160515
2021	31605208.158493053
2022	34109480.14259339