Year	current US$
1960	67600000
1961	63600000
1962	54400000
1963	87600000
1964	74300000
1965	86900000
1966	61600000
1967	82100000
1968	87700000
1970	37820000
1981	2372727.273
1982	4893636.364
1983	2108678.972
1984	3961789.323
1985	4815521.481000001
1986	3217454.466
1987	9600122.109000001
1988	8397080.433999998
1989	20730941.94
1990	41720585.93
1991	57375931.440000005
1992	165347794.3
1993	267261077.39999998
1994	242997609.7
1995	357137721.9
1996	292748815.3
1997	625820000
1998	933500000
1999	1040060000
2000	1368424322
2001	1496953941
2002	1920416460
2003	2110850675.0000002
2004	2795138030
2005	3020194237
2006	3570672774
2007	3534011764
2008	4357277612
2009	4983496341
2010	5583427009
2011	6706289204
2012	7842152502
2013	9248203351
2014	6881699609
2015	8577821855
2016	10100143038
2017	11313381413
2018	12739265001
2019	14866298103
2020	14813713730