Year	current US$
1970	690069500
1971	837990300
1972	985891920.2518363
1973	1210834258.1423402
1974	1383838658.5365853
1975	1578009756.0975611
1976	1669568574.908648
1977	1721541566.2650604
1978	2167218571.428571
1979	2385260410.9589043
1980	2392528194.4444447
1981	2434116626.5060244
1982	2550530470.5882354
1983	2726304540.16298
1984	2969287307.9112124
1985	2565495468.937657
1986	3005094072.474202
1987	3185737250.413328
1988	3516361081.794195
1989	3437648468.537742
1990	3735522207.4468083
1991	3106670260.679678
1992	2744525540.5405407
1993	2140804189.1891892
1994	2247363108.108108
1995	2094573981.871569
1996	1784600000
1997	1823000000
1998	1574400000
1999	1737100000
2000	2017700000
2001	2021200000
2002	1997200000
2003	2062600000
2004	2091400000
2005	1860828700
2006	1662870370.3703701
2007	2120648148.148148
2008	2149074074.074074
2009	2259259259.259259
2010	2152777777.7777777
2011	2487000000
2012	2816000000
2013	3028000000
2014	3176000000
2015	3342200000
2016	3598476270
2017	3680500000
2018	3784265500
2019	3689600000
2020	2965000000