Year	constant 2010 US$
2006	28025730299.3745
2007	30101898256.1527
2008	34176052556.0777
2009	33018955391.6682
2010	36609546610.7617
2011	41559211731.0825
2012	45170840399.8251
2013	49397290739.0876
2014	52261253982.1868
2015	51351754576.0776
2016	49603410079.4534
2017	52354902934.5713