Year	constant 2010 US$
1990	2615.78225322614
1991	2491.01476111178
1992	2440.27493555275
1993	2443.09893919673
1994	2353.62574739962
1995	2351.83005095281
1996	2376.63174013511
1997	2505.14206347432
1998	2522.7931457653
1999	2518.78152699213
2000	2648.49173393366
2001	2721.30541480427
2002	2889.63575603763
2003	3085.13068216734
2004	3385.98569140717
2005	3670.93754486188
2006	3983.33928031883
2007	4384.56018976182
2008	4676.22819466278
2009	4484.01052542899
2010	4701.72126714722
2011	5027.10245364541
2012	5248.57384304202
2013	5474.74774315447
2014	5548.17884981325
2015	5385.3638210338
2016	5438.6678733263
2017	5674.08765558259
2018	5812.99803053954