Year	current US$
1971	1250000
1972	3760000
1973	5200000
1974	9570000
1975	15710000
1976	22680000
1977	19200000
1978	18570000
1979	24920000
1980	34420000
1981	36470000
1982	36910000
1983	49560000
1984	53620000
1985	60350000
1986	94940000
1987	126080000
1988	192680000
1989	197620000
1990	194610000
1991	197440000
1992	147760000
1993	60570000
1994	75720000
1995	66330000
1996	65370000.00000001
1997	54030000
1998	67970000
1999	64810000
2000	65569999.99999999
2001	70550000
2002	78310000
2003	99220000
2004	124430000
2005	137920000
2006	161500000
2007	207580000
2008	232240000
2009	267750000
2010	283190000
2011	274810000
2012	268019999.99999997
2013	291270000
2014	325070000
2015	235750000
2016	195430000
2017	165730000
2018	132860000.00000001
2019	177770000
2020	210050000
2021	212610000
2022	176210000