Year	current US$
1977	176331330.5552164
1978	197092369.5646828
1979	233170000.544873
1980	315000000.63
1981	427178117.99016464
1982	286817876.8479215
1983	317230769.23076963
1984	255615384.615385
1985	308887535.716623
1986	154480000
1987	177946666.666667
1988	217199999.9999998
1989	347222222.22222245
1990	202200000
1991	184400000
1992	197000000
1993	99710000
1994	199200000
1995	149500000
1996	168770000
1997	168100000
1998	200400000
1999	269700000
2000	632000000
2001	638100000
2002	784300000
2003	804840000
2004	1023490000
2005	1459730095.46659
2006	2453800123.68672
2007	2615231393.2813478
2008	2464277586.81541
2009	2079390295.5141454
2010	2406313545.29893
2011	2685666962.622059
2012	1984597274.611499
2013	1921729755.982224
2014	1916506971.956419
2015	1485890333.5982878
2016	1346043129.992233
2017	1326355321.443943
2018	1062981731.2223932
2019	1300599202.352977
2020	1194289982.847653
2021	1290143915.1599104
2022	1385977207.644161