Year	constant 2015 US$
2006	18938851469.823715
2007	20082176345.275238
2008	23118992536.315613
2009	23615926837.89656
2010	27702876743.57555
2011	29345660153.043053
2012	31214553231.638382
2013	37368765957.088165
2014	35511118899.41111
2015	36297473726.943275
2016	35683330197.84677
2017	37943083411.399284
2018	39386875569.808876
2019	44937029699.16068
2020	45687660472.1986
2021	48926179925.23827
2022	51681446357.494514
2023	55143812310.37398