Year	current US$
2002	3855298263.9565816
2003	4330114357.752166
2004	4996781463.939756
2005	6145219406.730308
2006	6962158645.477703
2007	8668787530.00972
2008	9768577941.33211
2009	12642365226.895773
2010	14864149924.333984
2011	16062706809.418184
2012	19575474863.751373
2013	21060159748.95964
2014	21036150317.76264
2015	20114103580.532074
2016	19449602244.544895
2017	19032212583.774967
2018	19092091282.349815
2019	19698775580.262444
2020	19236860322.291866
2021	15387504467.756
2022	14891705444.242863