Year	current US$
1980	4099999.905
1981	500000
1999	229300000
2000	353000000
2001	354682787.235142
2002	357648054.733389
2003	181806184.128315
2004	194093350.611089
2005	197011480.809639
2006	206068761.958395
2007	235713817.426315
2008	381043892.119069
2009	482615626.422484
2010	331099938.256816
2011	395371393.19833
2012	325374046.280457
2013	367618755.016584
2014	301772021.253703
2015	278222282.503545
2016	349353415.866986
2017	344724544.18267
2018	399985495.005538
2019	379260254.123799
2020	198738585.115352
2021	222426096.669674
2022	245273593.776336