Year	current US$
1960	823100000
1961	903000000
1962	945200000
1963	819900000
1964	828200000
1965	752200000
1966	744800000
1967	825500000
1968	853400000
1969	955200000
1970	735000000
1971	807450000
1972	963670000
1973	1067220000
1974	1175850000
1975	1493330000
1976	1432010000
1977	1480500000
1978	1835010000
1979	2440420000
1980	2889000000
1981	2963610000
1982	3049780000
1983	2908740000
1984	3026030000
1985	3133520000
1986	4042130000
1987	5249560000
1988	5463170000
1989	5801750000
1990	7163480000
1991	7385520000
1992	8269990000
1993	7915140000
1994	8466040000.000001
1995	8443370000.000001
1996	7451270000
1997	6306610000
1998	5741590000
1999	5639340000
2000	4104710000
2001	4198029999.9999995
2002	5486150000
2003	7253090000
2004	8472559999.999999
2005	10026220000
2006	10600590000
2007	9883590000
2008	10907550000
2009	12601550000
2010	12915100000
2011	12997240000
2012	12028270000
2013	11338930000
2014	10620320000
2015	9039300000
2016	9621670000
2017	11330860000
2018	12839670000
2019	11984150000
2020	16013140000
2021	16721919999.999998
2022	17558930000