Year	constant 2010 US$
1992	4669.67633424122
1993	3572.27045855255
1994	2915.01442427489
1995	2632.54350703652
1996	3157.13347358573
1997	3281.97715035724
1998	3062.28779408408
1999	3707.63933425046
2000	4564.45374228024
2001	4717.26837009783
2002	4905.62387512759
2003	5258.67478301008
2004	6066.25340645009
2005	6740.25547117479
2006	7591.96629011569
2007	8692.56349611934
2008	9122.36461108627
2009	7487.59194006637
2010	8426.13737444287
2011	9248.52996321273
2012	9631.05261378966
2013	9618.37474619303
2014	9446.28546121618
2015	8900.88260896932
2016	8590.55717727584
2017	8761.43623246466