Year	current US$
1978	5145171496.307181
1979	5817518645.467346
1980	7364937126.540216
1981	7417731796.995616
1982	6709888765.877583
1983	6491512621.451972
1984	6085634209.788923
1985	6939192911.76771
1986	7184519392.946604
1987	7722405041.860932
1988	7891389084.55125
1989	8133117185.95802
1990	8814811541.090227
1991	9110459644.155273
1992	9128564415.560081
1993	9001021507.479868
1994	8897646366.310421
1995	10123798518.091682
1996	11709322793.235981
1997	11070133082.928783
1998	11968974260.610323
1999	11531401017.517857
2000	12335193853.293951
2001	13024709371.924482
2002	13990997989.890144
2003	14696432748.663294
2004	17627772776.776474
2005	20848424985.24745
2006	24821727673.9743
2007	30126891596.649216
2008	35445643829.00226
2009	33593776286.778248
2010	38170108298.01412
2011	46192100759.52245
2012	48968006654.22294
2013	52377378725.19248
2014	54901122094.87611
2015	52642751693.4056
2016	50732908179.681015
2017	54357781561.88406
2018	61376234247.52053
2019	61640891429.79512
2020	57296585224.580055
2021	66714272638.464
2022	77077387344.67152