Year	current US$
2007	40838460000
2008	35894700000
2009	31826650000
2010	30864420000
2011	27183020000
2012	26967480000
2013	25764430000
2014	25554860000
2015	25452410000
2016	24573951247.1655
2017	23968560000
2018	22740040000
2019	21036390000
2020	18205660000
2021	21855680000
2022	25429040000