Year	current US$
1981	9414545.455
1982	11886363.64
1983	13285365.52
1984	13109641.549999999
1985	23027000
1986	24541000
1987	30768000
1988	40177000
1989	44717000
1990	52106000
1991	53654620
1992	39648000
1993	34631560
1994	47866060
1995	49804459.85
1996	59303313.510000005
1997	70214358.54
1998	74625913.34
1999	63951316.910000004
2000	76174441
2001	76474665
2002	90706074
2003	112743862
2004	122864112
2005	97841074
2006	130356574
2007	109771900
2008	127884660
2009	75919086
2010	72997078
2011	117088561
2012	161576768
2013	167128968
2014	144917165
2015	144484398
2016	139624014
2017	200047091
2018	181646782
2019	158047562
2020	162799166