Year	current US$
1975	11548534.39
1976	7825888.634
1977	6186917.782
1978	11965122.22
1979	19509063.72
1980	18932262.42
1981	15272431.37
1982	14454989.43
1983	13121085.17
1984	11671637.54
1985	28713695.53
1986	37827827.45
1987	43921443.94
1988	39886085.51
1989	42067871.09
1990	45396983.1826744
1991	51221716.1253309
1992	69174791.0138465
1993	55727702.5370473
1994	36635136.8407979
1995	42231927.2307349
1996	22679982.17469
1997	21436793.8299568
1998	32302640.3539109
1999	29814886.9256177
2000	26321101.8021368
2001	23287998.9732515
2002	30323325.2592831
2003	57610085.8882629
2004	63903029.9667571
2005	69358786.110523
2006	57213885.7200915
2007	82777285.5747032
2008	105201783.948872
2009	167576232.387136
2010	176052971.205938
2011	129114434.884929
2012	110776021.645783
2013	133942195.549822
2014	147501911.553175
2015	132910580.538465
2016	160379732.463204
2017	155416517.700093
2018	207062585.891118
2019	206300457.374727
2020	205398548.737215
2021	235014952.044303
2022	230661903.598173