Year	constant 2010 US$
1995	3812.87504428799
1996	4247.7985685721
1997	4459.55899078105
1998	4405.17213191343
1999	3606.0981445312
2000	4097.58624735025
2001	4336.46158855041
2002	4194.19233185124
2003	4248.6961482745
2004	4856.67267343654
2005	5636.99629905546
2006	5182.51130753705
2007	6996.5862587381
2008	10227.4995956503
2009	10102.3501820473
2010	10172.620909688
2011	11045.9979712809
2012	11739.6953892001
2013	11722.7170081903
2014	10956.2177291657
2015	11526.3706655076
2016	12172.2195405855
2017	12293.9006330561
2018	11216.2354138987