Year	current US$
1982	3000000
1983	2000000
1984	2000000
1985	3000000
1986	3000000
1987	3000000
1988	4000000
1989	3000000
1990	5000000
1991	18000000
1992	15000000
1993	15000000
1994	19000000
1995	85666664.12
1996	152333328.2
1997	198000000
1998	272000000
1999	593000000
2000	754290000
2001	936000000
2002	1172943240.3348
2003	1597068954.4748
2004	1997994275.7942
2005	1817413689.7668
2006	2329992812.57431
2007	2493058145.24102
2008	2736390791.37784
2009	2051656434
2010	1455455375
2011	1618147148
2012	1788058506
2013	1714202599
2014	4155302052.29
2015	5718191072.59
2016	6210890955.57
2017	16253286877.31
2018	16548078395.86
2019	15135300288.47
2020	18295889482.74
2021	22957840161.89
2022	18255865706.18