Year	constant 2010 US$
2006	20170063452.2923
2007	22249823254.5541
2008	23718807476.1292
2009	21776748154.6692
2010	21336532132.4575
2011	21668674747.7484
2012	21752295659.2402
2013	21652221846.008
2014	22255496038.4641
2015	22624184329.9248
2016	23354220897.9481
2017	24009292341.0307
2018	24534577097.5825