Year	constant 2010 US$
1991	16843.9014695455
1992	16881.5380102072
1993	16912.7976297987
1994	16886.8911718505
1995	16608.0197152114
1996	16674.4562874172
1997	18051.2857920282
1998	20067.3877699615
1999	21545.308005762
2000	21331.3176156483
2001	21996.0974596954
2002	21529.7877875127
2003	21850.7400486395
2004	27637.4854848985
2005	24254.6799842757
2006	23595.3227051595
2007	23880.1709196162
2008	26431.8939601741
2009	24388.6797672083
2010	23406.0680171648
2011	27968.2648568292
2012	27191.3853386377
2013	26829.5621724555
2014	26056.4105866642
2015	28066.4585873394
2016	29668.2335467969
2017	33484.5686591836
2018	32809.2155961093