Year	current US$
1973	31260000
1974	32450000
1975	179670000
1976	257201876.941074
1977	426630795.39409
1978	404720202.194638
1979	503549116.207386
1980	423431059.618934
1981	396168538.583396
1982	452883548.624175
1983	440065240.039057
1984	435225366.951387
1985	442569173.989455
1986	425462269.519161
1987	436831275.943764
1988	393493500.962173
1989	384381683.181328
1990	403036130
1991	323052068.619777
1992	238582080.721878
1993	141453426.028357
1994	96064770.7258219
1995	261350625.109704
1996	583893072.237111
1997	362675088.430982
1998	192881376.027682
1999	205140895.727232
2000	286867571.747747
2001	422646281.569706
2002	321506275.379361
2003	494175782.69766
2004	632562570.997279
2005	718099379.435726
2006	1400679333.19493
2007	2053708696.89102
2008	1953401799.41046
2009	2560608735.36278
2010	3032636345.40448
2011	4256353335.28355
2012	3930345908.45073
2013	2774718317.14749
2014	2253527233.38802
2015	1691789679.62188
2016	1607736938.34872
2017	1680267339.34036
2018	2158651577.4358
2019	2242998947.22446
2020	2605186734.10776
2021	3162173315.79425
2022	3904931746.21434