Year	constant 2010 US$
1991	4353.56175047585
1992	4542.1448856732
1993	4829.1830513559
1994	4816.52519355502
1995	5127.22262898979
1996	5472.79119787752
1997	5377.01713406969
1998	5286.872023281
1999	5571.51643048271
2000	5320.43994691747
2001	5505.57858902454
2002	5700.31444446893
2003	5818.21026908263
2004	5806.02171614599
2005	5446.03213859296
2006	5696.04051142462
2007	5650.14755461984
2008	5449.6572524696
2009	5964.50126204503
2010	6064.99711498876
2011	6279.39049683111
2012	6401.12702628072
2013	6253.12333568
2014	6177.9938699946
2015	6391.84557991287
2016	6554.77285458278
2017	6472.83235903512
2018	4266.76454372451