Year	constant 2010 US$
1990	3180.54209360027
1991	3140.83444248246
1992	2833.19987218745
1993	2611.99605909695
1994	2309.09865764927
1995	2075.6499951585
1996	2140.90885473225
1997	2395.10936164256
1998	2608.67517443181
1999	2708.7393350487
2000	2879.38006548047
2001	3030.94752615782
2002	3204.19898457435
2003	3453.9636651659
2004	3875.7830645828
2005	4269.16602174832
2006	4724.92454603076
2007	5154.86716411286
2008	5700.31938066551
2009	5724.46885160699
2010	6181.39991568753
2011	6525.85136912335
2012	6642.03513243543
2013	6707.62152957548
2014	6817.28921850647
2015	6545.7805269077
2016	6372.40179455992
2017	6536.01210231683
2018	6744.49866958786