Year	current US$
1980	4032388631.46355
1981	4287334402.9229093
1982	4340025616.115462
1983	4609595451.372292
1984	5106883077.821306
1985	5572049594.628909
1986	5969819149.076189
1987	6419829079.918114
1988	7033326255.250131
1989	7007333363.559787
1990	7194315135.381231
1991	7246435260.918882
1992	7508805869.027749
1993	7723293257.750366
1994	8249847067.96802
1995	9371174172.814297
1996	10505203324.574217
1997	12525254351.042368
1998	13703901620.710089
1999	14538846713.796106
2000	15167281640.760956
2001	15198483973.926844
2002	16244547268.821598
2003	16649388958.526497
2004	17430076497.98807
2005	18973183742.974552
2006	22076268764.76829
2007	23971700143.151062
2008	24904230230.044476
2009	24616507586.592766
2010	24744686071.413784
2011	24419374582.365105
2012	26209982493.892857
2013	26864148376.834366
2014	28026632659.291977
2015	29317895263.09377
2016	27416377424.710022
2017	28604812126.01516
2018	29839274884.78486
2019	31397054985.77411
2020	25618183558.865807
2021	28187072928.39388