Year	current US$
1960	7500000
1961	6699999.80926514
1962	8550000.19073486
1963	6309999.94277954
1964	4650000.09536743
1965	4670000.07629395
1966	5760000.228881841
1967	7610000.1335144
1968	7570000.17166138
1969	9609999.65667725
1970	11159999.8474121
1971	12659999.8474121
1972	14810000.4196167
1973	17129999.1607666
1974	16329999.923706101
1975	25639999.3896484
1976	26260000.2288818
1977	28579999.9237061
1978	36310001.373291
1979	35479999.5422363
1980	36200000.762939505
1981	28870000.8392334
1982	26260000.2288818
1983	20159999.8474121
1984	20590000.1525879
1985	20219999.3133545
1986	24629999.1607666
1987	33490001.678466797
1988	29049999.237060502
1989	26709999.084472697
1990	43389999.3896484
1991	55799999.237060495
1992	45490001.6784668
1993	36659999.8474121
1994	28950000.762939498
1995	13869999.8855591
1996	31290000.915527303
1997	20950000.762939498
1998	23030000.6866455
1999	20909999.8474121
2000	15920000.076293899
2001	11439999.5803833
2002	21489999.7711182
2003	20670000.0762939
2004	18809999.4659424
2005	27250000
2006	36080001.8310547
2007	42520000.4577637
2008	65239997.8637695
2009	82190002.44140631
2010	70319999.6948242
2011	76519996.6430664
2012	53500000
2013	47580001.8310547
2014	42189998.626709
2015	35880001.0681152
2016	26299999.237060502
2017	40619998.9318848
2018	41860000.6103516
2019	41840000.1525879
2020	59330001.8310547
2021	52330001.8310547
2022	42029998.779296905