Year	constant 2010 US$
1990	18364.5428994532
1991	20174.6518418871
1992	20200.0318228758
1993	18931.1915507719
1994	17256.3825294903
1995	16462.5301617514
1996	21869.4412116865
1997	17630.8264694163
1998	15846.3621768626
1999	16481.8201058882
2000	16852.611566883
2001	17056.0366576804
2002	18511.0691823568
2003	18733.3815587516
2004	20501.3848339037
2005	22688.2789357307
2006	23681.6643451437
2007	23940.8435405108
2008	29794.598311818
2009	24699.5646258321
2010	25507.6650034023
2011	29255.9032029231
2012	30574.4968725062
2013	30297.1306000872
2014	30022.9049239735
2015	26673.3454867025
2016	25226.6596364278
2017	25648.0549487672