Year	current US$
1981	273720909.09999996
1982	253625068.5
1983	217500994.3
1984	210389168.79999998
1985	198291667.60000002
1986	286067840.3
1987	230130638.7
1988	258291597.1
1989	305299897.5
1990	224267474.9
1991	171206601.29999998
1992	114108574.89999999
1993	122465156.2
1994	141476732.3
1995	201837158.5
1996	210539981.7
1997	141300939.2
1998	206488161.10000002
1999	275349258.29999995
2000	256221004
2001	307221331
2002	338843628
2003	447114897
2004	604409564
2005	638612860
2006	748519467
2007	998884083
2008	1341832947
2009	1100384079
2010	1542193751
2011	1951438534
2012	1906829188
2013	2440930875
2014	2550134705
2015	2015814319
2016	1961477334
2017	2463201513
2018	3099404234
2019	2985007867
2020	2716277582