Year	constant 2015 US$
1970	22653981886.3459
1971	24598502740.918198
1972	25785629129.129017
1973	26671297264.61867
1974	26934526713.539135
1975	29486467668.095047
1976	31086456860.607285
1977	33793078516.58387
1978	36023741704.11163
1979	36420606204.48709
1980	34646755047.477715
1981	41467381501.89083
1982	45162515378.60675
1983	47625713446.226036
1984	51431508854.283745
1985	52147634310.553986
1986	52251076226.4043
1987	50979647607.80786
1988	53014852769.416306
1989	53449553564.61932
1990	51533037857.258354
1991	46154261250.081085
1992	41026796844.734764
1993	34864672413.7199
1994	34955749689.28951
1995	35763627281.46579
1996	38661585301.61875
1997	39767824901.34584
1998	39908974163.07056
1999	42351529982.71284
2000	44779368638.75874
2001	46406214509.908844
2002	46956965137.630806
2003	48847046590.10905
2004	51589798519.28272
2005	57510920309.988525
2006	64637424942.77734
2007	69017095500.21552
2008	71879511678.42465
2009	72277471389.55453
2010	74212419537.56416
2011	76843248758.98317
2012	79280541282.17305
2013	81593239072.66035
2014	82341170367.83147
2015	86014000000
2016	86315001318.32837
2017	87884424852.88487
2018	89800589267.66925
2019	89627732013.53192