Year	current US$
1977	839999.9961256974
1980	4830000.000074505
1981	3929999.9866634575
1982	3910000.046715138
1983	3329999.9497830872
1984	2209999.969229101
1985	2949999.9843537807
1986	2330000.024288892
1987	2400000.0301748496
1988	2959999.9710917454
1989	3720000.0174343586
1990	6319999.972358346
1991	7990000.03375113
1992	6260000.016540289
1993	4459999.99344349
1994	7549999.972805383
1995	10799999.885261059
1996	9820000.007748604
1997	10949999.993667006
1998	8390000.045299526
1999	7249999.981373543
2000	5889999.96334314
2001	8030000.040307643
2002	10359999.801963568
2003	9480000.019073488
2004	11020000.144839287
2005	10979999.916628003
2006	11470000.00812113
2007	12869999.96565282
2008	17809999.86827373
2009	19520000.029355302
2010	18689999.783411607
2011	18810000.138357267
2012	21561167.933046833
2013	17155095.160007466
2014	15149810.880422598
2015	13566082.827746859
2016	10050470.083951946
2017	8600334.599614143
2018	8646309.964358803
2019	16107296.50408029
2020	16366339.787840819
2021	16874684.33380126
2022	19270800.32229424