Year	constant 2021 US$
1980	15991255
1981	18941269
1982	16826645
1983	17625055
1984	35280856
1985	39967666
1986	40103542
1987	42465441
1988	53005470
1989	53417457
1990	62029531
1991	102029617
1992	83663035
1993	111913039
1994	125480991
1995	119019132
1996	151362566
1997	195476503
1998	239559377
1999	253185046
2000	289953497
2001	334478337
2002	330972310
2003	356797731
2004	382631173
2005	397064772
2006	418843862
2007	486776783
2008	478740380
2009	491241561
2010	479155304
2011	448412018
2012	458258221
2013	466612603
2014	447806711
2015	449172963
2016	491209104
2017	511629654
2018	533996107.00000006
2019	553223595
2020	498127068
2021	539370000
2022	562357504