Year	current US$
2000	37.34068519002168
2001	37.435568543039196
2002	36.45423491549512
2003	40.023465351978075
2004	45.234274912808864
2005	52.61321494631089
2006	58.60332207817867
2007	68.15395858096032
2008	77.5046453140867
2009	78.2230077186644
2010	90.29841106087885
2011	103.13745378504032
2012	108.10830713102717
2013	113.99093252563287
2014	115.34270744275537
2015	110.46675532686804
2016	111.88451869367222
2017	121.87988603874523
2018	128.76813414604158
2019	132.40999950249204
2020	131.8447469354794
2021	150.52745623440626