Year	current US$
1970	3107849900
1971	3774218800
1972	4440618048.268625
1973	5453185524.728589
1974	6230604878.04878
1975	7107769512.195123
1976	7521366869.671133
1977	7756427469.8795185
1978	9754973766.233767
1979	10724539589.041096
1980	10798984861.11111
1981	10974353855.421688
1982	11498254941.176472
1983	12212789289.871944
1984	13277762891.291975
1985	11823365214.543072
1986	13474821694.264458
1987	14356164822.5868
1988	15274497097.62533
1989	15240865948.993977
1990	15440258909.574469
1991	14442730176.061144
1992	13484219189.18919
1993	13854524729.72973
1994	19333090675.675674
1995	21455873739.308056
1996	14897000000
1997	15503100000
1998	16245600000
1999	17589500000
2000	18558100000
2001	19180000000
2002	19608200000
2003	20982900000
2004	21006900000
2005	22559500000
2006	27249907407.407406
2007	28055000000
2008	27619907407.407406
2009	27646296296.296295
2010	29971296296.296295
2011	36469000000
2012	39755000000
2013	41878000000
2014	44432000000
2015	48554000000
2016	51029000000
2017	54221000000
2018	55987000000
2019	56540000000
2020	54345000000