Year	current US$
1975	153000000
1976	300000000
1977	202000000
1978	449000000
1991	530700000.00000006
1992	595850000
1993	211960000
1994	432500000
1995	554560000
1996	1865100000
1997	962190000
1998	871610000
1999	1775020000
2000	4460570000
2001	1567300000
2002	1741100000
2003	3912990000
2004	11257690000
2005	7197880000
2006	4713980000
2007	8146940000
2008	14618110000
2009	16988400000.000002
2010	16987110000
2011	14409330000
2012	15061390000
2013	44305850000
2014	23365970000
2015	8444809999.999999
2016	18689210535.0725
2017	11741666197.0633
2018	34857280000
2019	98258400000
2020	176306440000
2021	239337540000
2022	236947730000