Year	current US$
1977	13619999.930262554
1980	38500000.00745059
1981	32719999.866560098
1982	32189999.98271466
1983	35830000.005662456
1984	33769999.908283345
1985	36179999.77618456
1986	28790000.064298507
1987	30819999.873638153
1988	36170000.15452504
1989	45830000.10810791
1990	57680000.40203334
1991	55000000.13597311
1992	44969999.66353177
1993	47489999.987185
1994	78419999.87699091
1995	97049999.30597842
1996	100209999.55572186
1997	99690000.17829241
1998	105150000.30957162
1999	88949999.90426004
2000	68220000.4979968
2001	115450000.29169022
2002	140679999.16709962
2003	138969999.60765246
2004	116459999.65071678
2005	118780000.14275312
2006	125839999.73535538
2007	138800000.30994415
2008	189399999.43971634
2009	182409999.6984005
2010	191759999.96066093
2011	180289998.9187717
2012	184229164.47604075
2013	188734605.8140974
2014	185468392.37213135
2015	176900145.17307281
2016	148041235.6853485
2017	122809849.27713872
2018	121661570.31059267
2019	171590414.25585747
2020	182806850.6121635
2021	192172577.32152942
2022	220468521.47579193