Year	current US$
1977	794000000
1978	896000000
1979	1088000000
1980	1318000000
1981	1522000000
1982	1716000000
1983	1598000000
1984	1149000000
1985	845000000
1986	823000000
1987	1124000000
1988	1301000000
1989	1536000000
1990	1721000000
1991	1783000000
1992	2305000000
1993	3072000000
1994	4639000000
1995	6906000000
1996	9392000000
1997	14073000000
1998	10087000000
1999	5072000000
2000	5175000000
2001	5348000000
2002	5439000000
2003	5377000000
2004	5814000000
2005	6395320577.26
2006	6491470863.41
2007	7417665307.8
2008	10875251514.27
2009	8965206944.58
2010	11714152839.8936
2011	12013358383.99196
2012	13962383010.515461
2013	16058334848.051676
2014	20606917767.727177
2015	23355452661.01125
2016	23803650945.499813
2017	25844797492.54973
2018	26270817294.489487
2019	27685821539.009605
2020	17552795140.089012
2021	19124223081.900368
2022	24854856598.885338
2023	28806448812.523735