Year	current US$
1978	1000000
1979	2000000
1980	7000000
1981	5000000
1982	4000000
1983	2000000
1984	7000000
1985	7000000
1986	7000000
1987	6000000
1988	6000000
1989	1000000
1990	1000000
1991	10000000
1992	3000000
1993	14000000
1994	34000000
1995	31000000
1996	25000000
1997	22000000
1998	28760000.2288818
1999	48099998.4741211
2000	37310001.373291
2001	33950000.762939505
2002	105610000.61035201
2003	152910003.66210902
2004	121290000.915527
2005	67239997.8637695
2006	32849998.4741211
2007	39630001.0681152
2008	42680000.3051758
2009	41500000
2010	53529998.779296905
2011	64940002.44140631
2012	77290000.9155273
2013	61139999.3896484
2014	58709999.0844727
2015	60909999.8474121
2016	52319999.6948242
2017	56500000
2018	50560001.373291
2019	44779998.779296905
2020	40819999.6948242
2021	41709999.0844727
2022	60150001.5258789