Year	current US$
1974	810138591.8886833
1975	837683970.8176949
1976	1145803738.1588948
1977	1431007624.8257768
1978	1647387341.8278162
1979	2398234491.790975
1980	4175960485.856582
1981	3767468234.839721
1982	3601593439.3289795
1983	3044840396.5831385
1989	1464707848.9102466
1990	1812932509.3667262
1991	1873172990.6515007
1992	1914096479.5480816
1993	1462441615.2831647
1994	1395795852.4175026
1995	1732780668.4892848
1996	1847464009.9117684
1997	1847379388.283722
1998	1209965093.2539515
1999	1696798207.8601403
2000	2961937292.1576624
2001	2478753133.157302
2002	2759772041.362949
2003	3187739577.3004327
2004	4045088828.252756
2005	5635951278.4509945
2006	7126480474.6329775
2007	7007554896.74886
2008	9380334145.517076
2009	5618709047.1473
2010	8654141630.16159
2011	12689271833.584675
2012	12915118757.137472
2013	11684300884.135279
2014	10768089405.227934
2015	7131407414.734481
2016	5999755528.480534
2017	6433664713.579855
2018	7640419254.232463
2019	7341841742.418189
2020	6100108646.571038
2021	7378774332.92132
2022	9445168446.273848
2023	7506406692.080889