Year	constant 2010 US$
2008	22791482658.2573
2009	23488043057.3343
2010	23972202221.3066
2011	22885180056.2915
2012	25510516330.2284
2013	27476639381.774
2014	30436067215.9166
2015	32950657181.2619
2016	36610591407.1007
2017	37985473365.2535
2018	40831755834.216