Year	constant 2010 US$
1981	3692072458.50089
1982	3594076344.9188
1983	3570382609.65349
1984	3815295112.54151
1985	3725512946.04028
1986	3957252478.28233
1987	3803782151.26852
1988	3834593668.66172
1989	4021603213.73974
1990	4189016147.64991
1991	4192258140.7437
1992	4411932272.91537
1993	4541502366.10077
1994	4761931896.61343
1995	4943334518.04163
1996	5088572905.68844
1997	5024097489.87036
1998	5125170700.73121
1999	5373884057.18584
2000	5339723413.25164
2001	5401772714.78
2002	5505359658.30929
2003	5618170144.70533
2004	5836648509.91236
2005	5969596539.46603
2006	6117810815.57779
2007	6196997971.69626
2008	6319975318.83031
2009	6235670937.8398
2010	6416533300.58371
2011	6679792145.19468
2012	6797319722.95202
2013	6983921996.20021
2014	7259472583.70921
2015	7526511164.92762
2016	7778710041.41643
2017	8093155368.29672
2018	8382236502.81037