Year	current US$
1960	203100000
1961	222500000
1962	248300000
1963	290200000
1964	308700000
1965	327600000
1966	406000000
1967	494800000
1968	467900000
1969	553850000
1970	643920000
1971	662620000
1972	870620000
1973	1453990000
1974	2029470000
1975	2292800000
1976	2552760000
1977	2753220000
1978	3375310000
1979	3881210000
1980	5183030000
1981	4245660000
1982	4294060000.0000005
1983	4413030000
1984	4815260000
1985	4561960000
1986	5650610000
1987	6531960000
1988	5428333947
1989	7530901890
1990	8062674557
1991	8667992618
1992	9437401862
1993	9092691800
1994	8808125531
1995	10961090220
1996	11949000000
1997	11129824837
1998	10737342161
1999	10481312863
2000	11694121714
2001	11416006538
2002	11446805073
2003	14158405005
2004	16642979030.999998
2005	18436327986
2006	21533033564
2007	26557419729
2008	31280761557
2009	25148232632
2010	28017246341
2011	33779711247
2012	35323975856
2013	36139907582
2014	35960653529
2015	28553969131
2016	28150661502
2017	32626733965
2018	39502288488
2019	37907451445
2020	35178940267