Year	current US$
1977	3099999.905
1978	4699999.809
1979	5400000.095
1980	6000000
1981	6099999.905
1982	4000000
1983	6000000
1984	5900000.095
1985	4500000
1986	1700000.048
1987	2099999.905
1988	2799999.952
1989	2000000
1990	500000
1991	4099999.905
1992	4599999.905
1993	3500000
1994	200000.003
1995	266666.6806
1996	333333.3433
1997	400000.006
1998	1350000.024
1999	2299999.952
2000	1250000
2001	200000.003
2002	15100000.38
2003	23500000
2004	9100000.381
2005	3900000
2006	2100000
2007	2800000
2008	2200000
2009	4600000
2010	4300000
2011	3893784.52780305
2012	8057490.75
2013	6993693.2785482
2014	8833808.60389336
2015	6705559.50380625
2016	1493543.56631083
2017	97912850.922945
2018	98678756.5334151
2019	96177384.3131186
2020	124028649.078413
2021	147616111.518767
2022	148170216.467004
2023	146894430.35151