Year	current US$
2009	4222083824
2010	5250955802
2011	7892193340
2012	9976912710
2013	10721956963
2014	11158954970
2015	9566457385
2016	8018601370
2017	8826982509
2018	8555017226
2019	9622862087
2020	10012730412
2021	12425071106
2022	14732035173