Year	current US$
2008	3085232166.398125
2009	2935683523.200889
2010	3233534267.786809
2011	3881049088.6870246
2012	3503444518.962199
2013	3509081008.5730033
2014	3788279431.614076
2015	3246709183.220607
2016	3420956563.9939737
2017	3811642713.673427
2018	4511505444.788627
2019	4458675169.275965
2020	4160534488.162056
2021	6140292437.575188
2022	6678126143.634138
2023	7357035178.596533