Year	current US$
1968	3059999.94277954
1969	2390000.10490417
1970	2720000.02861023
1971	3599999.90463257
1972	4070000.1716613797
1973	4449999.80926514
1974	4090000.1525878897
1975	4260000.228881841
1976	4050000.1907348596
1977	3579999.92370605
1978	4949999.80926514
1979	5699999.80926514
1980	5000000
1981	8880000.11444092
1982	8399999.61853027
1983	4730000.01907349
1984	4280000.20980835
1985	4920000.07629395
1986	5599999.90463257
1987	5250000
1988	6119999.88555908
1989	8430000.30517578
1990	7789999.96185303
1991	7269999.98092651
1992	4570000.17166138
1993	4239999.771118159
1994	3640000.10490417
1995	2940000.05722046
1996	4409999.84741211
1997	6849999.90463257
1998	6380000.11444092
1999	6000000
2000	3480000.01907349
2001	2920000.07629395
2002	2250000
2003	1980000.01907349
2004	2230000.01907349
2005	2180000.0667572
2006	2990000.00953674
2007	2480000.01907349
2008	2049999.9523162802
2009	3430000.0667572
2010	2410000.08583069
2011	1740000.0095367401
2012	2174763.91792297
2013	2071770.9064483598
2014	4589756.48880005
2015	1780169.4869995099
2016	1374081.73084259
2017	713550.746440887
2018	692014.336585999
2019	618280.053138733
2020	837875.783443451
2021	1043512.22515106
2022	1827483.7732315098