Year	current US$
1981	32380699.999999996
1982	26983000
1983	21429100
1984	25369663.23
1985	36506951.440000005
1986	63395496.98
1987	77608067.79
1988	182926193.89999998
1989	197053810.8
1990	197785012
1991	220056023.39999998
1992	306338592.6
1993	300185518.5
1994	302635444.8
1995	306566654.09999996
1996	312601956.3
1997	332216734.8
1998	335202963
1999	354548888.90000004
2000	349544182
2001	276518306
2002	315829591
2003	408497546
2004	422639188
2005	486357373
2006	593150256
2007	616005876
2008	658610925
2009	620795483
2010	649918393
2011	708961504
2012	657867880
2013	888869645
2014	643553561
2015	585086616
2016	669831792
2017	664727968
2018	674341144
2019	625089746
2020	697039063