Year	current US$
1960	51000000
1961	77000000
1962	53000000
1963	38000000
1964	46000000
1965	54080001.8310547
1966	40369998.9318848
1967	47290000.9155273
1968	42619998.9318848
1969	49000000
1970	45000000
1971	37000000
1972	30000000
1973	15000000
1974	17000000
1975	6000000
1976	-3000000
1977	6000000
1978	9000000
1979	4000000
1980	10000000
1981	5000000
1982	4000000
1983	16000000
1984	18000000
1985	9000000
1986	22000000
1987	35000000
1988	37000000
1989	37000000
1990	31000000
1991	8000000
1992	1000000
1993	-12000000
1994	-15000000
1995	-14000000
1996	-21000000
1997	-19000000
1998	-21069999.6948242
1999	-20680000.3051758
2000	-19690000.5340576
2001	-18760000.2288818
2002	-20760000.2288818
2003	-17200000.762939498
2004	-15670000.076293899
2005	-15140000.3433228
2006	-12750000
2007	-10869999.8855591
2008	-8069999.694824221
2009	-5260000.228881841
2010	-3230000.01907349
2011	4760000.228881841
2012	107580001.831055
2013	16840000.1525879
2014	18370000.8392334
2015	20489999.7711182
2016	30709999.084472697
2017	29399999.6185303
2018	45169998.1689453
2019	125379997.253418
2020	93660003.6621094
2021	109370002.746582
2022	72180000.3051758