Year	current US$
2006	6428000000
2007	8825000000
2008	10972000000
2009	8345000000
2010	9795000000
2011	11779000000
2012	11229000000
2013	14614000000
2014	14845000000
2015	13376000000
2016	14874000000
2017	16992000000
2018	19227000000
2019	19630000000
2020	19498000000
2021	25564000000
2022	29058000000
2023	30935000000