Year	constant 2010 US$
2006	4299.92382228327
2007	4556.87300899255
2008	4848.9301382474
2009	4732.75340759317
2010	4710.91236327574
2011	4774.2616705643
2012	4807.60421211115
2013	5033.69127082914
2014	5154.82362699422
2015	5388.88908751102
2016	5606.58338024233
2017	5801.31969407821
2018	6024.321015942