Year	constant 2010 US$
1990	3173.5963868128
1991	3133.97544974994
1992	2827.01269559824
1993	2606.29195010464
1994	2301.32504266994
1995	2066.34250550395
1996	2133.36593586839
1997	2380.6640699766
1998	2592.61090503252
1999	2696.6988465153
2000	2865.97492443488
2001	3015.54330759957
2002	3192.68748194153
2003	3449.99369950221
2004	3870.51558577418
2005	4265.97317643989
2006	4702.60662965179
2007	5104.39188143198
2008	5622.03170474673
2009	5604.92706269639
2010	6065.88872459504
2011	6383.53114175005
2012	6479.93004410226
2013	6455.924183678
2014	6594.19657838626
2015	6245.04355165023
2016	6072.80032773678
2017	6279.89295814484
2018	6468.38644683859