Year	current US$
1977	927665100.1
1978	1773296997
1979	2213571533
1980	2696000000
1981	2180857178
1982	2439142822
1983	3665857178
1984	3962714355
1985	3211714355
1986	2506142822
1987	3604285645
1988	3769571533
1989	3293454590
1990	4283500000
1991	4054000000
1992	6104000000
1993	5664000000
1994	3672000000
1995	3226000000
1996	3107000000
1997	3697000000
1998	3370000000
1999	3235300000
2000	2852000000
2001	2911400000
2002	2893100000
2003	2960900000
2004	3340700000
2005	5017300000
2006	5329500000
2007	7655800000
2008	8694000000
2009	7149600000
2010	12453100000
2011	14324300000
2012	19236400000
2013	17833100000
2014	19570400000
2015	18325400000
2016	18590400000
2017	24737400000
2018	25515700000
2019	26781400000
2020	29602900000
2021	31487000000
2022	28332800000
2023	24200000000