Year	constant 2015 US$
1991	10305.217252639673
1992	10404.220938040262
1993	10042.54044095843
1994	10108.542826514053
1995	9839.450802779016
1996	9882.345101528985
1997	9706.427698144633
1998	9791.555989410052
1999	10006.608182171694
2000	10143.628185882406
2001	10349.512799854192
2002	10347.81055445073
2003	10511.640675965753
2004	11126.630382981271
2005	11512.375525882218
2006	11305.879224112521
2007	11772.195284728241
2008	11942.441340445645
2009	12032.177775378614
2010	12184.799697653862
2011	12623.31762615169
2012	13064.433359408502
2013	12961.139168975016
2014	12979.712017162681
2015	12966.417470584827
2016	13180.54360042145
2017	13574.023812845066
2018	13483.608886979233
2019	13517.0662547975
2020	12912.285738069342
2021	13111.20409813492
2022	13596.824764001522