Year	current US$
1968	39009999.9308586
1969	29490000.009536702
1970	35989999.994635604
1971	43479999.6763468
1972	46059999.8533726
1973	50620000.6008148
1974	51760000.655427605
1975	73430000.1114607
1976	70420000.4339218
1977	67629999.8760223
1978	80710000.038147
1979	99069999.9332428
1980	127469999.134541
1981	193530001.40190098
1982	166650001.04904202
1983	134579999.923706
1984	128750000.178814
1985	159590001.52349502
1986	178669999.063015
1987	179399999.61852998
1988	213699999.094009
1989	231509999.990463
1990	214230000.257492
1991	246540001.988411
1992	204480002.760887
1993	173320000.290871
1994	148549998.283386
1995	128630001.187325
1996	180919997.45369
1997	212089997.76840198
1998	185289999.723434
1999	164780000.329018
2000	105279999.73297101
2001	92270000.7557869
2002	96989999.7115135
2003	106989999.771118
2004	140539999.723434
2005	143020001.292229
2006	159720000.14782
2007	154349999.547005
2008	193590001.21615797
2009	213959998.846054
2010	191820000.886917
2011	165970000.26702902
2012	165330305.57632402
2013	161734302.043915
2014	174683063.715696
2015	158750621.676445
2016	155015177.75654802
2017	149087008.80408302
2018	156376819.84901398
2019	187537271.94666898
2020	221557403.534651
2021	199001107.633114
2022	224174968.00422665