Year	current US$
1979	6546761.52339844
1980	7437411.39781717
1981	6956080.33549217
1982	6996403.21551317
1983	6266604.93348771
1984	7655315.65009511
1985	7817459.69074675
1986	7674227.31417937
1987	9253840.37937734
1988	10445473.149505
1989	10688776.7172799
1990	11888972.2173482
1991	14053268.7447504
1992	14511194.8609123
1993	13590102.7586847
1994	15884180.0993268
1995	18449098.4098889
1996	19314016.851981
1997	20045704.2226813
1998	19270109.1127896
1999	19438466.2109465
2000	20212803.0088926
2001	18296388.0260843
2002	18358852.4967959
2003	22866274.1390402
2004	27130684.4389928
2005	29387346.4382385
2006	31244595.6905498
2007	37297616.7731908
2008	41442480.3144121
2009	45405166.5611382
2010	55144310.2042344
2011	61825126.8014586
2012	53727421.3244037
2013	54728773.0415098
2014	55647208.1812019
2015	54560600.9182318
2016	58598793.0220222
2017	68853737.4344133
2018	71440656.3137775
2019	72137824.6139707
2020	69452797.8914845
2021	77541761.9655785