Year	current US$
1970	6690000.05722046
1971	7840000.15258789
1972	9329999.92370605
1973	9050000.19073486
1974	11260000.2288818
1975	16879999.1607666
1976	8720000.26702881
1977	13489999.7711182
1978	18850000.3814697
1979	28739999.7711182
1980	32590000.152587898
1981	33159999.847412102
1982	34970001.220703095
1983	33209999.084472697
1984	31000000
1985	31879999.1607666
1986	46340000.1525879
1987	42500000
1988	56860000.6103516
1989	72540000.9155273
1990	79150001.5258789
1991	40849998.4741211
1992	63349998.4741211
1993	57319999.6948242
1994	68110000.6103516
1995	57270000.4577637
1996	62650001.5258789
1997	31110000.6103516
1998	29889999.3896484
1999	30540000.915527303
2000	31879999.1607666
2001	30829999.9237061
2002	30389999.3896484
2003	26329999.9237061
2004	28879999.1607666
2005	34669998.1689453
2006	37990001.6784668
2007	36979999.5422363
2008	36590000.1525879
2009	42029998.779296905
2010	42159999.8474121
2011	43040000.9155273
2012	38898429.8706055
2013	40736759.185791
2014	47041824.3408203
2015	54455074.3103027
2016	58949291.229247995
2017	64811882.019043
2018	57140087.127685495
2019	63026000.9765625
2020	50948001.8615723
2021	48882999.420166
2022	54097999.5727539