Year	current US$
2009	21673554319
2010	26627203713
2011	30832704795
2012	33997382728
2013	39435184017
2014	44855869339
2015	44054004215
2016	44068190712
2017	46185557372
2018	50051653161
2019	50254311167
2020	46727060853
2021	58797308247
2022	55329420594