Year	current US$
2006	13172000000
2007	19164000000
2008	24331000000
2009	16047000000
2010	16735000000
2011	19862000000
2012	18925000000
2013	20543000000
2014	20601000000
2015	17876000000
2016	19245000000
2017	21947000000
2018	25882000000
2019	26730000000
2020	26233000000
2021	33797000000
2022	41148000000
2023	39838000000