Year	constant 2015 US$
2008	4131038324.786327
2009	4117289221.8380966
2010	4077907274.4260883
2011	3532796290.1708345
2012	4076047660.849904
2013	4585864267.015907
2014	4777088156.161619
2015	5236929530.443764
2016	5509178674.099916
2017	5951293233.71406
2018	7297826323.287669
2019	8800126343.406689
2020	8548670770.719424
2021	8948299510.812452
2022	9214705764.499268
2023	10008215395.460594