Year	current US$
1976	19060000
1977	21879000
1978	28434000
1979	22210000
1980	47675000
1981	37200900
1982	45890000
1983	42878000
1984	54804905.949999996
1985	52638777.06
1986	54112661.86
1987	64360241.11000001
1988	85134811.47999999
1989	104421117.80000001
1990	113348133
1991	120464858.1
1992	106938430.80000001
1993	94206817.53
1994	96345350.37
1995	117282493
1996	129953612.99999999
1997	134497037
1998	132219259.30000001
1999	140224814.79999998
2000	147523344
2001	131216062
2002	116136489
2003	128053904.99999999
2004	145987887
2005	167732032
2006	172685674
2007	197657671
2008	237188990
2009	225527677
2010	210556598
2011	216143499
2012	215129214
2013	214446222
2014	213546586
2015	206692034
2016	215090631
2017	401847337
2018	681589548
2019	572406101
2020	259628180.99999997