Year	current US$
1960	43000000
1961	28000000
1962	32000000
1963	30000000
1964	18000000
1965	26129999.1607666
1966	22120000.8392334
1967	38409999.8474121
1968	44470001.220703095
1969	37000000
1970	37000000
1971	33000000
1972	23000000
1973	24000000
1974	18000000
1975	13000000
1976	9000000
1977	8000000
1978	9000000
1979	7000000
1980	16000000
1981	18000000
1982	23000000
1983	23000000
1984	35000000
1985	24000000
1986	32000000
1987	23000000
1988	22000000
1989	31000000
1990	30000000
1991	23000000
1992	18000000
1993	16000000
1994	9000000
1995	15000000
1996	3000000
1997	8000000
1998	7389999.8664856
1999	2019999.9809265102
2000	12640000.3433228
2001	24649999.6185303
2002	36439998.626709
2003	27100000.3814697
2004	10109999.6566772
2005	20719999.3133545
2006	24969999.3133545
2007	44529998.779296905
2008	39560001.373291
2009	23600000.3814697
2010	46450000.762939505
2011	16049999.2370605
2012	53220001.220703095
2013	56540000.9155273
2014	56979999.5422363
2015	43389999.3896484
2016	53310001.373291
2017	51939998.626709
2018	40020000.4577637
2019	45159999.8474121
2020	43669998.1689453
2021	64510002.1362305
2022	62080001.8310547