Year	current US$
1970	4151651.97824231
1971	3780758.11755544
1972	3753822.0191768
1973	6125155.8991078
1974	7153593.90193836
1975	15303676.2897688
1976	9792750.81091895
1977	32009427.9767267
1978	34196494.7165146
1979	15194233.136791
1980	18313070.1216147
1981	16083385.6749794
1982	24134451.4276431
1983	16503255.9797149
1984	13656894.6664349
1985	9525873.87520895
1986	15990405.7427968
1987	14733841.4951735
1988	15443613.0999708
1989	15044438.8092339
1990	17758309.780894
1991	17944505.6886693
1992	18256349.250604
1993	14218942.8868693
1994	13215940.5584872
1995	16733338.5401447
1996	16783279.5829922
1997	14386895.2365189
1998	14659429.6483913
1999	16609209.42198
2000	16352488.8435655
2001	16480553.7901648
2002	17508812.052923
2003	19152322.6453307
2004	19173719.0677797
2005	19231869.0604708
2006	26667503.1506575
2007	45429630.512607
2008	41280776.12969
2009	39277126.1504428
2010	71238666.3032855
2011	74690698.3715377
2012	64760951.4073182
2013	53107365.0397122
2014	57499362.369426
2015	71189641.7762622
2016	85046298.9466106
2017	72815889.3722763
2018	42185412.455103
2019	47572298.372344
2020	57324410.1023669
2021	60791709.2632788