Year	current US$
1977	73300000
1978	63700000
1979	49400000
1980	41000000
1981	41400000
1982	36800000
1983	35600000
1984	34200000
1985	39300000
1986	29500000
1987	29500000
1988	37400000
1989	16500000
1990	34400000
1991	50200000
1992	50600000
1993	71600000
1994	93392000
1995	121420506
1996	146528000
1997	186334000
1998	221464000
1999	255222000
2000	268900000
2001	296000000
2002	302300000
2003	354700000
2004	416600000
2005	493400000
2006	429600000
2007	486200000
2008	703600000
2009	655300000
2010	732000000
2011	900700000
2012	993200000
2013	1023700000
2014	1107700000
2015	1158200000
2016	1301000000
2017	1465100000
2018	1258600000
2019	1266500000
2020	885000000
2021	978421141.86
2022	1452600000
2023	1452000000