Year	current US$
1969	3700000
1970	8400000
1971	10100000
1972	11100000
1973	14800000
1974	25200000
1975	22600000
1976	13000000
1977	15700000
1978	15600000
1981	48792700
1982	32192600
1983	36242800
1984	43672200
1985	38236987.47
1986	51074971.08
1987	70452165.99
1988	61407695.96
1989	71384008.19
1990	84547446.02
1991	116384733
1992	114540090.5
1993	103260297.6
1994	107761021.3
1995	148316007.7
1996	152534395.4
1997	56596607.29
1998	47796536.72
1999	69636872.16
2000	36281203
2001	35137034
2002	37133332
2003	45860700
2004	64955267.00000001
2005	85150008
2006	101386047
2007	120486022
2008	119105298
2009	180103122
2010	180495214
2011	210606304
2012	206901575
2013	210476266
2014	192566377
2015	173435753
2016	196288991
2017	209132415
2018	229710877
2019	201264924
2020	226828791