Year	current US$
1974	3532128.334
1975	7978280.067
1976	9774999.619
1977	12074999.81
1978	14260000.23
1979	16868654.25
1980	35311187.74
1981	39934127.81
1982	37207046.51
1983	53047302.25
1984	52668056.49
1985	47550159.45
1986	55010177.61
1987	78878868.1
1988	94789123.54
1989	109773315.4
1990	112819404.6
1991	108643890.4
1992	110693702.7
1993	82737571.72
1994	77068580.63
1995	82223879.5065459
1996	75395830.2603552
1997	83751347.7578842
1998	78365182.9282171
1999	70009838.5283754
2000	56796073.4859676
2001	52717094.5512915
2002	44130934.4309573
2003	65225295.5291864
2004	82797580.5349868
2005	95421869.7624513
2006	95655068.5902868
2007	95122183.1658119
2008	89637366.0559554
2009	93457762.6198995
2010	54690323.8454676
2011	63506470.1844086
2012	88545679.8406554
2013	75120413.2116206
2014	95824457.5499699
2015	95771402.3373992
2016	98421043.9932031
2017	144415393.563011
2018	125737322.128684
2019	118702081.809135
2020	112495380.432469
2021	132168224.635491
2022	126482605.275691
2023	120428024.291992