Year	current US$
2007	444602326.814094
2008	511381018.068047
2009	435374730.581266
2010	432777941.711782
2011	481041750.548784
2012	365401000.282385
2013	398633378.931761
2014	355214107.509146
2015	333603924.062667
2016	423358562.650147
2017	406324405.991975
2018	527820430.815929
2019	548336315.561317
2020	437764604.15059
2021	459364500.413535