Year	constant 2010 US$
1995	23017.3075338583
1996	24788.8191339151
1997	25738.5383985803
1998	26828.3222922977
1999	27271.2114328218
2000	28628.482000817
2001	30920.9811110213
2002	32446.7206508542
2003	34824.2118617531
2004	34315.3930117231
2005	35056.5524315981
2006	34813.8388377251
2007	35901.4597033999
2008	36522.6417737096
2009	34262.8961843331
2010	35378.324643295
2011	37871.3866626698
2012	37265.7161819055
2013	37001.8319464397
2014	34939.0721094712
2015	34773.3013360322
2016	34872.7747296818
2017	34605.8081451421
2018	34997.6029751329