Year	current US$
1960	39000000
1961	268000000
1962	159000000
1963	138000000
1964	212000000
1965	135289993.28613302
1966	289380004.88281304
1967	187229995.727539
1968	223509994.506836
1969	138000000
1970	120000000
1971	104000000
1972	54000000
1973	42000000
1974	69000000
1975	43000000
1976	30000000
1977	-5000000
1978	-22000000
1979	-27000000
1980	-33000000
1981	-31000000
1982	-36000000
1983	-13000000
1984	11000000
1985	-56000000
1986	11000000
1987	-17000000
1988	6000000
1989	-15000000
1990	-12000000
1991	3000000
1992	-376000000
1993	-68000000
1994	-2000000
1995	-5000000
1996	-7000000
1998	-8810000.4196167
1999	-157770004.272461
2000	-57849998.4741211
2001	-70750000
2002	-37139999.3896484
2003	-56080001.8310547
2004	-57459999.0844727
2005	-25930000.3051758
2006	-67860000.6103516
2007	3849999.90463257
2008	12329999.923706101
2009	8140000.34332275
2010	20709999.084472697
2011	29790000.915527303
2012	22540000.915527303
2013	22579999.9237061
2014	16969999.3133545
2015	14630000.1144409
2016	19030000.6866455
2017	21110000.6103516
2018	24280000.6866455
2019	38970001.220703095
2020	48939998.626709
2021	46860000.6103516
2022	45590000.1525879