Year	constant 2010 US$
1991	13987.8996055979
1992	9956.14280499173
1993	9853.32860404998
1994	9358.80721163794
1995	9510.43471077122
1996	13300.5370146593
1997	12198.8590546596
1998	12898.1644156723
1999	11360.6490700937
2000	12038.3435715762
2001	12028.6825164994
2002	13355.6826485403
2003	13376.0417991486
2004	13755.3115219002
2005	14883.1991049798
2006	15215.4787878417
2007	16098.4033378441
2008	14744.9020584571
2009	14961.7633976907
2010	16176.9467368907
2011	16573.8173977881
2012	16510.2884413751
2013	16196.1453219869
2014	16307.8533220175
2015	16467.3420370553
2016	16983.8469932881
2017	16997.0894489733
2018	17650.1654465315