Year	current US$
1974	4291566.372
1975	7787678.719
1976	6290005.684
1977	6447419.643
1978	8486373.901
1979	8649801.254
1980	11283628.46
1981	9181859.016
1982	7133157.253
1983	6838709.831
1984	7458405.495
1985	8983602.524
1986	15965653.42
1987	16131149.29
1988	15699271.2
1989	13231630.33
1990	13890889.17
1991	13019886.97
1992	18172077.18
1993	15870740.89
1994	6903759.956
1995	7705122.96629063
1996	4498072.65850385
1997	5335212.2751347
1998	18782891.2085683
1999	26628265.5741953
2000	14460552.8692145
2001	21992150.0958046
2002	19055424.4824812
2003	25538999.3670974
2004	59819315.2557564
2005	66396291.6094392
2006	78177635.3489454
2007	79455329.8941434
2008	94105372.4236593
2009	102125604.17868
2010	134423547.478468
2011	166152208.678693
2012	151834370.002531
2013	145912239.085974
2014	219080291.987395
2015	171586253.022659
2016	176370907.300439
2017	264041277.585807
2018	296677560.021195
2019	308661888.805164
2020	520943729.781565
2021	353331220.113844
2022	725240824.854786
2023	530000000