Year	current US$
2007	435610183.15879
2008	501693520.09114
2009	426321526.931219
2010	424064401.57794
2011	471601973.599969
2012	356186698.842048
2013	388740964.524908
2014	345110445.060126
2015	325018604.160601
2016	415137898.615408
2017	398330956.390061
2018	519376330.11062
2019	540356390.303208
2020	429829224.04506
2021	450967278.212846