Year	constant 2010 US$
1991	21849.2707413034
1992	18844.0614405772
1993	18979.9571204672
1994	18989.0491770923
1995	21922.5455123103
1996	20515.8996555006
1997	23516.379330212
1998	22156.1378336005
1999	17876.9238054093
2000	18704.9039797982
2001	18517.9819950312
2002	23510.8567840831
2003	31881.6115132984
2004	19510.8719300294
2005	21994.8329989965
2006	26352.6584146226
2007	26299.5507871438
2008	21021.4541576556
2009	23204.5739412233
2010	23356.0377888084
2011	21388.1186992624
2012	21783.1793264898
2013	18040.6741748451
2014	16389.4029816872
2015	16087.6565940957
2016	16935.2548687396
2017	20164.5380271607