Year	constant 2010 US$
1991	3106.32963682985
1992	3965.04535072666
1993	4209.50453638611
1994	4777.42029617185
1995	5241.26928744069
1996	5745.58092233119
1997	6037.2844154691
1998	5942.90547903543
1999	7247.78354809221
2000	6903.73145223322
2001	7623.47664790567
2002	8640.0653168068
2003	8606.5504601365
2004	8982.01237678534
2005	7776.41631423355
2006	8240.81172039788
2007	8254.00388108537
2008	7983.84153968354
2009	8297.93857975122
2010	8368.97845271025
2011	8638.96511691157
2012	8889.37120888238
2013	9179.04657044773
2014	9813.29304804943
2015	10091.0233293126
2016	8843.1381078896
2017	8911.52465926793