Year	constant 2010 US$
1990	7178.54163877101
1991	6498.31053795441
1992	6393.02227561638
1993	6501.04731042118
1994	6773.77706202958
1995	7151.25505648042
1996	7478.05994429252
1997	7721.64184753867
1998	7950.76788657813
1999	8120.43073970217
2000	8496.47177062714
2001	8815.35481699813
2002	9185.75796188595
2003	9587.73512244049
2004	10173.2403907921
2005	10710.2333288257
2006	11442.45201361
2007	12224.9654533519
2008	12746.1909823187
2009	12330.0907792548
2010	12567.4049958914
2011	13001.2360889231
2012	13127.9190934683
2013	13331.9579482039
2014	13767.2728238792
2015	14327.5772613701
2016	14815.4332093776
2017	15553.4058813907
2018	16259.8499417518