Year	current US$
1968	620000.004768372
1969	409999.99642372096
1970	730000.019073486
1971	1110000.01430511
1972	910000.026226044
1973	639999.985694885
1974	1570000.05245209
1975	1600000.02384186
1976	119999.997317791
1977	349999.99403953605
1978	12909999.8474121
1979	4980000.01907349
1980	8819999.69482422
1981	7159999.84741211
1982	6210000.03814697
1983	10829999.923706101
1984	9970000.26702881
1985	11869999.8855591
1986	15210000.038146999
1987	16420000.076293899
1988	21290000.915527303
1989	19399999.6185303
1990	33099998.4741211
1991	26170000.0762939
1992	17399999.6185303
1993	12729999.5422363
1994	9050000.19073486
1995	8130000.11444092
1996	9770000.45776367
1997	11430000.3051758
1998	13970000.2670288
1999	11880000.1144409
2000	11619999.8855591
2001	7420000.07629395
2002	4139999.8664856004
2003	460000.00834465
2004	6400000.09536743
2005	6500000
2006	5409999.84741211
2007	5699999.80926514
2008	5619999.88555908
2009	6610000.1335144
2010	7489999.771118159
2011	9319999.69482422
2012	8875401.49688721
2013	9471453.66668701
2014	10473883.6288452
2015	9155681.61010742
2016	4635680.19866943
2017	2779313.5643005404
2018	2046652.07862854
2019	1160295.00961304
2020	1956413.1498336801
2021	2144794.70252991
2022	1347150.8026123