Year	current US$
1968	9999.99977648258
1975	9000000
1976	15409999.8474121
1977	26409999.8474121
1978	25639999.3896484
1979	40330001.8310547
1980	35810001.373291
1981	31549999.237060502
1982	46259998.3215332
1983	36729999.5422363
1984	30639999.3896484
1985	33959999.0844727
1986	68849998.4741211
1987	54479999.5422363
1988	89349998.4741211
1989	99500000
1990	136080001.831055
1991	134990005.493164
1992	97199996.9482422
1993	71779998.7792969
1994	73529998.7792969
1995	54150001.5258789
1996	61250000
1997	52049999.237060495
1998	31899999.6185303
1999	51419998.1689453
2000	46270000.4577637
2001	42619998.9318848
2002	45270000.4577637
2003	56529998.779296905
2004	67919998.1689453
2005	79250000
2006	91750000
2007	103569999.69482401
2008	119599998.47412099
2009	98860000.6103516
2010	84540000.9155273
2011	108809997.558594
2012	114709999.084473
2013	136020004.272461
2014	119169998.168945
2015	90720001.2207031
2016	67330001.8310547
2017	55279998.779296905
2018	75080001.8310547
2019	86050003.0517578
2020	79790000.9155273
2021	91419998.1689453
2022	70970001.2207031