Year	current US$
2008	4919604511.498462
2009	4783939983.328702
2010	4992996238.941866
2011	5548711467.204147
2012	5386837081.062469
2013	5802546002.69608
2014	6267146964.109214
2015	5356323560.7392025
2016	5463570140.60997
2017	5689811185.19305
2018	6288119720.39732
2019	6326469745.279977
2020	6551733097.809054
2021	7812800679.46017
2022	8020552814.339016
2023	8762019443.933773