Year	current US$
1960	177830814.16913944
1961	195813705.48961422
1962	207802299.7032641
1963	243768082.34421366
1964	237773785.23738873
1965	255756676.5578635
1966	305905044.51038575
1967	338000000
1968	372000000
1969	405000000
1970	469000000
1971	675000000
1972	778000000
1973	995000000
1974	2197000000
1975	3413000000
1976	3755000000.0000005
1977	4071000000
1978	4041000000
1979	4896000000
1980	6406000000
1981	7498999999.999999
1982	5725999999.999999
1983	5103999999.999999
1984	4625999999.999999
1985	3910999999.9999995
1986	3887999999.9999995
1987	3783999999.9999995
1988	3411999999.9999995
1989	3865000000
1990	1653000000
1991	1490000000
1992	1571999999.9999998
1993	1546999999.9999998
1994	1518999999.9999998
1995	1799999999.9999998
1996	1975000000
1997	2061000000
1998	1826000000
1999	2024999999.9999998
2000	2194000000
2001	1929000000.0000002
2002	2103000000.0000005
2003	2337000000.0000005
2004	2739000000.0000005
2005	2948000000.0000005
2006	3551000000.0000005
2007	3957000000.0000005
2008	4594000000
2009	3876000000
2010	4830000000
2011	5761000000
2012	6534000000
2013	6088000000
2014	5471000000
2015	4677000000
2016	4570000000
2017	5126000000
2018	5158000000.000001
2019	5398000000.000001
2020	5977000000.000001
2021	8180000000.000001
2022	15738000000.000002
2023	17471000000