Year	current US$
1976	805000000
1977	940000000
1978	989000000
1979	1181000000
1980	1119000000
1981	1169000000
1982	1140000000
1983	964000000
1984	945000000
1985	807000000
1986	967000000
1987	1407000000
1988	1737000000
1989	1387000000
1990	1817000000
1991	2173000000
1992	2531000000
1993	2655000000
1994	2886000000
1995	3286000000
1996	3079000000
1997	3062000000
1998	2673050049
1999	2284100000
2000	2193819905.93717
2001	2014591008.5579
2002	1660397779.58459
2003	1565054104.28351
2004	1242683995.0922
2005	1219664383.6797
2006	1543110071.1647
2007	2483241140.54474
2008	2686826465.03647
2009	2022132944.21384
2010	1498782297.44565
2011	1186959012.16992
2012	680981913.33544
2013	804714812.674238
2014	734925603.08843
2015	509336316.242094
2016	417164366.413
2017	400870186.190082
2018	489699591.408583
2019	676327504.794212
2020	611381979.592984
2021	688866261.623507
2022	600581231.936084
2023	530094604.492188