Year	current US$
1977	2417064.47826972
1978	3911274.73003437
1979	3631265.1977098
1980	7560045.259717515
1981	6411465.2140561
1982	7247382.147538855
1983	8424078.664825087
1984	7995464.406265756
1985	9802815.396989813
1986	12698142.913844984
1987	15694604.056874499
1988	25912829.1977165
1989	29508521.67401425
1990	33945902.73112773
1991	26754210.07222392
1992	33317002.1320665
1993	32605266.915312324
1994	39652278.60235843
1995	52943227.70405832
1996	61827501.62246584
1997	58705815.16426879
1998	57757153.19373878
1999	42712747.3157677
2004	93921252.81598648
2005	129233434.60215734
2006	138213048.65971306
2007	167370833.91726613
2008	168356888.22111815
2009	162054584.805446
2010	181092579.498209
2011	183757602.812251
2012	190435952.59228724
2013	206197418.505677
2014	198427739.883034
2015	197630002.672093
2016	211994247.300317
2017	241050438.672147
2018	258794457.522646
2019	286218692.715853
2020	78226094.057449
2021	68773452.3093674
2022	121938673.324675
2023	303819555.568596