Year	current US$
1968	7099999.90463257
1969	3769999.98092651
1970	4849999.90463257
1971	4510000.228881841
1972	2380000.1144409203
1973	2309999.94277954
1974	2490000.00953674
1975	7329999.92370605
1976	6699999.80926514
1977	6159999.84741211
1978	7920000.07629395
1979	11010000.2288818
1980	11199999.8092651
1981	12170000.076293899
1982	13640000.3433228
1983	11390000.3433228
1984	11279999.7329712
1985	12180000.3051758
1986	10680000.3051758
1987	10729999.5422363
1988	10659999.8474121
1989	13369999.8855591
1990	22870000.8392334
1991	23450000.762939498
1992	22270000.4577637
1993	16020000.4577637
1994	12130000.1144409
1995	8229999.54223633
1996	5929999.82833862
1997	9520000.45776367
1998	8189999.580383301
1999	7400000.09536743
2000	4039999.96185303
2001	5940000.05722046
2002	6360000.1335144
2003	7349999.90463257
2004	7119999.88555908
2005	11640000.3433228
2006	11220000.2670288
2007	11090000.1525879
2008	9869999.88555908
2009	9489999.77111816
2010	12680000.3051758
2011	10470000.2670288
2012	9483057.02209473
2013	6591849.80392456
2014	6964141.3688659705
2015	7416655.06362915
2016	4923823.35662842
2017	3596330.1658630404
2018	1537901.9975662201
2019	1475088.0002975499
2020	1571562.8862381
2021	1920059.0848922702
2022	2265187.50190735