Year	current US$
1970	184421.949795619
1971	251868.069908815
1972	244868.698000439
1973	328938.710801394
1974	385431.128321894
1975	479357.291765873
1976	387035.581884058
1977	590925.768764672
1978	710034.768222312
1979	668244.594524086
1980	801371.216652592
1981	797733.251909706
1982	1851304.24892915
1983	1350039.83378951
1984	1404890.91656536
1985	568972.118724935
1986	1513596.80269628
1987	1540472.68990779
1988	1586007.1279074
1989	1741839.43461963
1990	1809959.30085877
1991	1948744.63056679
1992	1690116.98364683
1993	1366356.56403461
1994	1414759.43463715
1995	2182299.63743081
1996	2314835.37158014
1997	1954629.10147783
1998	3746810.99232098
1999	1908348.75738245
2000	1712863.72968963
2001	2027291.0887156
2002	2266910.33175676
2003	3214491.56192799
2004	3132315.74661183
2005	3175086.58398759
2006	3983194.44797538
2007	3784786.04163681
2008	6811444.589031
2009	6805910.65338781
2010	8352142.74073848
2011	9737756.86345933
2012	11414098.878564
2013	9747609.61835742
2014	15760528.0912317
2015	14568284.577478
2016	11482649.7858587
2017	14556819.8480287
2018	7770289.90143402
2019	10594355.6790064
2020	9773281.08547128
2021	9284810.26109362