Year	constant 2015 US$
2008	2200256700.5019746
2009	2322560660.1714582
2010	2365677744.482934
2011	2503972298.0921926
2012	2619749654.113748
2013	2751142165.281088
2014	2804539549.5098124
2015	2936341667.9980826
2016	3015357839.055506
2017	3186103639.874449
2018	3381109648.157396
2019	3573575427.0468097
2020	3401412254.8633766
2021	3720936537.0292954
2022	3946187765.9323444
2023	4047221129.447442