Year	constant 2010 US$
1990	6284.5036578192
1991	5966.91329271349
1992	5305.69183027873
1993	5011.28540484897
1994	4484.60699851361
1995	4413.45562752355
1996	4383.43580163642
1997	4475.74016948195
1998	4354.39771147023
1999	4436.13580328668
2000	4808.60079261504
2001	4963.04343104862
2002	5239.93981712581
2003	5550.05993750967
2004	6033.98857407292
2005	6442.62133941513
2006	6919.48477260301
2007	7449.89210950394
2008	7726.89340411458
2009	7242.56429358149
2010	7565.71935216158
2011	7951.29098578697
2012	8205.22037851597
2013	8473.02646833537
2014	8622.31885938091
2015	8674.10580850096
2016	8757.81969524936
2017	9045.50825203925
2018	9237.7731723874