Year	current US$
1972	78000000
1973	135000000
1974	104000000
1975	379000000
1976	75000000
1977	81000000
1978	165000000
1979	157000000
1980	174000000
1981	118000000
1982	185000000
1983	200000000
1984	206000000
1985	165000000
1986	146000000
1987	146000000
1988	120000000
1989	138000000
1990	169000000
1991	129000000
1992	130000000
1993	94000000
1994	152000000
1995	56000000
1996	41000000
1997	30000000
1998	4039999.96185303
1999	113629997.253418
2000	62540000.9155273
2001	87129997.253418
2002	72139999.3896484
2003	56610000.6103516
2004	62849998.4741211
2005	49150001.5258789
2006	41770000.4577637
2007	49139999.3896484
2008	93190002.44140631
2009	63819999.6948242
2010	113690002.441406
2011	109010002.13623
2012	187820007.32421902
2013	155899993.89648402
2014	234660003.66210902
2015	211619995.117188
2016	244190002.44140598
2017	274250000
2018	324140014.64843804
2019	404869995.11718804
2020	309570007.324219
2021	443829986.57226604
2022	375630004.88281304