Year	current US$
1960	1889500000
1961	2469400000
1962	2011797000
1963	2238269000
1964	2325593000
1965	2370441000
1966	2555580000
1967	3701799000
1968	3941692000
1969	4340511000
1970	4881208000
1971	5152386000
1972	6075502000
1973	10478219000
1974	17871331000
1975	16221313000
1976	20364982000
1977	24762236000
1978	37536685000
1979	51787243000
1980	67350048000
1981	72403857263.35301
1982	70734007837.61401
1983	71164656614.422
1984	78632194567.823
1985	76104450932.53099
1986	77086422411.39601
1987	95432060102.75899
1988	115358276720.86398
1989	133553262044.40999
1990	155060146782.27
1991	178859362279.44907
1992	210005553425.37494
1993	233173225184.274
1994	289754452253.0621
1995	357031419744.6099
1996	371201706534.50995
1997	415385521964.6699
1998	407299041899.29694
1999	441551641201.52
2000	539532330046
2001	532752473063
2002	607016937437
2003	751412291887
2004	967304889307
2005	1188517144775
2006	1465708717978
2007	1782229489730
2008	2077847643637
2009	1746327656427
2010	2275999340706
2011	2725901595011
2012	2893412478707
2013	3067228253513
2014	3226174039344
2015	3100679486670
2016	2951184927658
2017	3226714994357
2018	3532511539858
2019	3537320353450
2020	3622922427026