Year	constant 2010 US$
1988	2138299699.76839
1989	2110299080.79929
1990	2021912069.4845
1991	2051470857.29211
1992	1941072454.59938
1993	1971514772.1059
1994	1899332510.40006
1995	1901023750.26153
1996	1919365888.70426
1997	1890279038.82688
1998	1886152805.55705
1999	1832628040.68391
2000	1765924683.65726
2001	1782223305.0731
2002	1715481481.93353
2003	1719607715.20337
2004	1637083049.80669
2005	1679376940.82248
2006	1703102782.12403
2007	1742301998.18746
2008	1611809871.02895
2009	1702071223.80657
2010	1701039665.48911
2011	1682471615.77486
2012	1660808891.10823
2013	1733017973.33033
2014	1707744794.55259
2015	1614904545.98133
2016	1664419345.21933
2017	1678345382.50502
2018	1695366094.74309