Year	current US$
1960	31300000
1961	16600000.000000002
1962	24400000
1963	28800000
1964	24100000
1965	28800000
1967	49192000
1968	53704000
1969	82792000
1970	54762000
1971	41128000
1972	45302000
1973	56359000
1974	64784000.00000001
1981	72121500
1982	76098000
1983	26124257.279999997
1984	40490629.35
1985	54011315.779999994
1986	60097104.31
1987	79816408.71000001
1988	102021984.8
1989	128737910.6
1990	148595907.79999998
1991	154274450.1
1992	258363582.09999996
1993	431900000
1994	564100000
1995	588800000
1996	689600000
1997	408510000
1998	644570845.8000001
1999	808877443.3
2000	654926407
2001	681007264
2002	687060801
2003	765010344
2004	999438632
2005	1201584217
2006	1563617982
2007	1994796109
2008	2696018629
2009	2753217186
2010	3448695936
2011	4421864435
2012	6109483516
2013	7030978001
2014	7675793058
2015	7229010023
2016	6403713593
2017	6912841723
2018	7329712386
2019	7268756002
2020	6482258306