Year	current US$
1968	44400000
1969	26070000
1970	21680000
1971	29500000
1972	37060000
1973	43150000
1974	49791749.3585898
1975	53283293.0695293
1976	47419157.5627205
1977	67083563.002373
1978	58118559.6371956
1979	77543083.6251967
1980	92269277.8802252
1981	100205503.194829
1982	113488532.440932
1983	121973941.278934
1984	161141024.7222
1985	182475237.258348
1986	231498467.823811
1987	170115271.744528
1988	172036083.486967
1989	146838360.448918
1990	158165375.368113
1991	181313537.598879
1992	155332535.372008
1993	172283366.874487
1994	176619981.956283
1995	179199375.081757
1996	171391392.400695
1997	227046333.545615
1998	346518164.92189
1999	410499712.197927
2000	349644583.160698
2001	319252843.728164
2002	380645829.417907
2003	491108558.163103
2004	674401942.812061
2005	586297936.226167
2006	461331327.062986
2007	464482895.393893
2008	567909087.744537
2009	1009823819.80338
2010	1044153800.49774
2011	1070217424.65299
2012	846941347.75579
2013	807408405.007461
2014	874337064.77897
2015	895475136.251959
2016	1001933945.18353
2017	1413972940.85571
2018	1345344674.14449
2019	1757782753.50028
2020	2382077961.01193
2021	2432716261.37975
2022	2609421074.79741
2023	2511681591.43478