Year	current US$
2002	4461046833.65406
2003	9474431523.15791
2004	9714600331.86431
2005	10845438839.0921
2006	11657129749.4821
2007	12747725748.9257
2008	17619813692.6208
2009	16895266900.962599
2010	15971930582.34735
2011	18483486685.602
2012	14992392742.07
2013	15426123476.814
2014	14689219322.4449
2015	15678386839.1263
2016	14899541020.7378
2017	15125597884.431
2018	15551159404.661905
2019	13617335994.248972
2020	4931730943.786896
2021	5807973027.873382
2022	8214182646.387593
2023	7892661313.273712