Year	current US$
1979	7838000
1980	8162000.000000001
1981	8603000
1982	4350000
1983	5264000
1984	8776000
1985	5009000
1986	5823000
1987	6727000
1988	9720251.54
1989	10223931.64
1990	12717239.040000001
1991	17202447.72
1992	12922777.83
1993	16935987.099999998
1994	14316830.84
1995	14646353.28
1996	12585365.729999999
1997	10083462.040000001
1998	7512789.217
1999	12497095.84
2000	254333195
2001	193060568
2002	228017133
2003	83523158
2004	73390537
2005	48113537
2006	45919634
2007	59901583
2008	43539001
2009	38097782
2010	40067250
2011	55517841
2012	48577259
2013	32501436
2014	146669215
2015	139734399
2016	199487502
2017	205351952
2018	129171117.00000001
2019	254492379
2020	187062028