Year	current US$
1975	53300598.14
1976	99174268.72
1977	1053856391.86
1978	1214555717.48
1979	1146284696.66
1980	1471001607.65
1981	1919396723.17
1982	1941263632.19
1983	2443259281.18
1984	1681610925.32
1985	1263758153.9399998
1986	865859404.602
1987	766637154.599
1988	731549594.8610001
1989	657981575.0139999
1990	697652298.0805432
1991	673224825.5872214
1992	837618924.0187793
1993	669275027.3166585
1994	734083816.1420602
1995	664095747.33321
1996	618391922.8513777
1997	837793472.3145618
1998	625653983.80918
1999	539535955.462603
2000	828082343.3551925
2001	1053806700.6895449
2002	3659215157.3266177
2003	5219250058.108584
2004	5694019366.312441
2005	5646482956.806085
2006	6157509523.862524
2007	5086255002.473994
2008	6723497990.282514
2009	8566492876.353261
2010	7941360482.008982
2011	6414932627.326777
2012	8671879824.498804
2013	9977442999.968523
2014	7794545405.096885
2015	6784283452.450915
2016	6741922840.231229
2017	6828259067.285618
2018	7656512657.395636
2019	7376576264.556841
2020	5427654033.070807
2021	4924988389.457084
2022	3522722668.302631