Year	current US$
1976	1153216847.38548
1977	1725617744.98166
1978	1798690400.93368
1979	1951353595.96012
1980	2701673653.48401
1981	3334506285.23721
1982	1308780931.61399
1983	1379622970.02499
1984	1124591487.06756
1985	1698763774.5907
1986	1176659382.346
1987	537573455.738995
1988	559140723.144346
1989	657286662.585827
1990	1430181808.87911
1991	1681065790.3799
1992	2398443104.53932
1993	936195921.063576
1994	1206619070.60154
1995	995114573.148448
1996	1495047674.51416
1997	1858439630.75508
1998	1253229261.07965
1999	1994280278.93684
2000	2806455248.35873
2001	2059681865.37778
2002	2170091026.45534
2003	2159081651.01408
2004	2764713887.24179
2005	4785479926.2691
2006	6781118699.02839
2007	7419678983.446
2008	10981921424.4336
2009	8707820739.747
2010	8574896422.07
2011	12417257721.0884
2012	13498269062.6851
2013	14206713594.28
2014	14511125448.2226
2015	9242446333.09685
2016	9718041446.40048
2017	9933685485.6539
2018	8484618684.92607
2019	8183926020.29395
2020	5924559403.59391
2021	6647647115.9183