Year	constant 2010 US$
1991	29791.1043162872
1992	27806.35014878
1993	28401.3477346357
1994	28724.233258142
1995	27366.8159393878
1996	26461.7500799747
1997	27428.4120712494
1998	28298.4519956442
1999	27188.2625078924
2000	28122.8036403347
2001	27342.474211642
2002	27274.34302148
2003	28156.25218658
2004	27699.6885411083
2005	28170.0553136427
2006	30054.5722730159
2007	30129.3100423286
2008	30643.4519086691
2009	30486.1666536512
2010	31187.8326155702
2011	31640.9706250955
2012	32342.1513287515
2013	32012.9782849073
2014	33220.9270725039
2015	32973.9846167321
2016	32502.7483624744