Year	current US$
2006	1582716903.609382
2007	2283510979.6881404
2008	3044381118.311909
2009	3558146434.99822
2010	4034978077.413517
2011	4726704497.595713
2012	5134620422.633946
2013	5962660947.480292
2014	6316173574.577617
2015	5158458485.034916
2016	5078678575.126225
2017	4990168460.11004
2018	5301447140.02299
2019	5147764955.392637
2020	5074633512.154279
2021	5623873811.6696615
2022	5379365577.193645
2023	5441425881.359893