Year	current US$
1960	1628600000
1961	1682100000
1962	1761300000
1963	1948700000
1964	2571020000
1965	2784110000
1966	2420380000
1967	2508600000
1968	2463617000
1969	2677083000
1970	3347982000
1971	3838831000
1972	3642869000
1973	4524845000
1974	6902945000
1975	10730743000
1976	12438731000
1977	16126628000
1978	19611867000
1979	18168965467.9
1980	11785240319.41
1981	31775194640.1
1982	25739036169.47
1983	21989456692.62
1984	17530383669.25
1985	17792352459.9
1986	15280926145.63
1987	16828586787.070002
1988	17693626492.41
1989	18835620984.399998
1990	20521019661.3
1991	22798200190
1992	27810771644.8
1993	26191527252.23
1994	25536628848.469997
1995	31234216769.600002
1996	37440203413.5
1997	35917940096.5
1998	31630091895.4
1999	31191385068.7
2000	32963251187
2001	35069864150
2002	36971152747
2003	45895784673
2004	53991863589
2005	70287375999
2006	82240624158
2007	99380981554
2008	125453326283
2009	106425604305
2010	124657140291
2011	157456160987
2012	152040889125
2013	165395593610
2014	175988567226
2015	149559627138
2016	134200389867
2017	146231734164
2018	162693274024
2019	158977474020
2020	145422172515