Year	constant 2010 US$
1990	3659.2539317494
1991	4376.50101615634
1992	4935.1808224783
1993	5102.2041763361
1994	5324.75648213305
1995	5508.63955374594
1996	5922.47446497774
1997	5860.07097276332
1998	5951.0211435643
1999	5855.07944500154
2000	5825.58232141311
2001	5691.35440120214
2002	5370.83841812648
2003	4594.98407955235
2004	5438.90815151382
2005	5608.18940076908
2006	5721.22138502827
2007	6382.95453251941
2008	6876.07942952193
2009	7340.65787704168
2010	7654.08231503168
2011	7410.12922926849
2012	7157.99043874067
2013	6878.12866490397
2014	6569.00218914797
2015	6330.65703796787
2016	6218.76356963086
2017	6266.01349011193
2018	5997.66600602353