Year	current US$
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	15652.0051006094
1992	518796.602683985
1993	1645980.1115639
1994	1364139.63011803
1995	3083793.55341157
1996	42474530.7570403
1997	164119213.170872
1998	142477476.039088
1999	277891546.814433
2000	635752665.02846
2005	3598458659.65567
2006	4226875967.10287
2007	5185873679.67366
2008	7274410650.21901
2009	3216526560.57351
2010	4573954852.51075
2011	6078651701.38435
2012	6790300527.0237
2013	5578183225.00014
2014	4895471519.01177
2015	1851705234.40017
2016	1400114213.47357
2017	1940965940.80673
2018	2456758610.05141
2019	1882088024.95526
2020	996226969.153337
2021	1715601238.63287