Year	current US$
1960	119900000
1961	116500000
1962	126600000
1963	141100000
1964	149600000
1965	156800000
1966	185100000
1967	151800000
1968	158900000
1969	189950000
1970	183730000
1971	205150000
1972	266800000
1973	330790000
1974	488120000
1975	732590000
1976	1021930000
1977	1381040000
1978	1498760000
1979	1948020000
1980	2373230000
1981	3186540000
1982	3139270000
1983	3002030000
1984	2767600000
1985	2720950000
1986	2423295669
1987	2679172003
1988	2777940000
1989	2110530480.9999998
1990	2581088366
1991	2617648823
1992	3258366645
1993	3622522597
1994	3428356396
1995	3721186789
1996	4316424231
1997	4069026234
1998	3808828632
1999	3666036671
2000	4597186849
2001	4871386011
2002	5020446921
2003	5743313099
2004	8163667947
2005	10492388569
2006	11547489981
2007	13531076372
2008	16994807938.000002
2009	14235553789
2010	15562946621
2011	18926756211
2012	20791052112
2013	22049716334
2014	22914301395
2015	20466181408
2016	16715496451
2017	20316533665
2018	20266199032
2019	19336759867
2020	17010948739