Year	constant 2010 US$
2008	4362.68811851792
2009	4535.3390919178
2010	4775.99912034836
2011	4441.59173047348
2012	5040.4243920148
2013	4977.26275786873
2014	5168.95488684119
2015	4367.20368484595
2016	4561.87026911037
2017	4669.27495122576
2018	4903.44258684228