Year	current US$
1960	287100000
1961	344500000
1962	345800000
1963	373300000
1964	405000000
1965	401800000
1966	431300000
1967	434600000
1968	456200000
1969	463310000
1970	475120000
1971	514539999.99999994
1972	552120000
1973	689030000
1974	2016060000
1975	1768200000
1976	2192990000
1977	2158960000
1978	2005980000
1979	2580190000
1980	3864920000
1981	3720940000
1982	3024390000
1983	2291360000
1984	2078230000
1985	2133580000
1986	1341240000
1987	1424830000
1988	1336230000
1989	1491396895
1990	1889878617
1991	1894909224
1992	1794578294
1993	1572978760
1994	2366271833
1995	2961160318
1996	2418449917
1997	2543858962
1998	2263828292
1999	2804818080
2000	3040943842
2001	4284940108
2002	3850774621
2003	5815927784
2004	7304604199
2005	10790548608
2006	15767667748
2007	15070132742
2008	20859457759
2009	10339644827
2010	12404834576
2011	16808297967.999998
2012	13114798822
2013	17340897766
2014	15283735210
2015	9005851646
2016	4759394297
2017	5680682774
2018	7741903899
2019	5125667382
2020	5543799819