Year	current US$
1972	262420000.00000003
1973	357070000
1974	346390000
1975	327100000
1976	400420000
1977	474050000
1978	513240000
1979	656060000
1980	790170000
1981	791350000
1982	768060000
1983	724460000
1984	931440000
1985	998890000
1986	888910000
1987	1076800000
1988	1291130000
1989	1304840248
1990	1670504965
1991	1687510930
1992	2037466815
1993	2277308415
1994	2649708023
1995	3129160836
1996	3297161478
1997	3627563897
1998	3821914233
1999	4520113779
2000	5589577566
2001	5735614032
2002	5443255653
2003	6229390323
2004	7585600652
2005	8494401623
2006	10836237255
2007	12212590573
2008	13627575923
2009	14377479202
2010	16496951393
2011	23099940958
2012	22250777588
2013	25912957676
2014	28433794800
2015	29924639202
2016	30195282032
2017	31392754034
2018	33775434148
2019	35919388110
2020	30746123926