Year	current US$
2000	50.76306208751186
2001	48.63806816862715
2002	60.6062993523959
2003	79.90896996274837
2004	100.85283192802223
2005	120.86886815838054
2006	143.38331052216836
2007	175.78369136302257
2008	211.11800787154726
2009	199.17765457756371
2010	208.3116643647807
2011	217.69079418139978
2012	227.12667943015862
2013	235.65469921968352
2014	222.69494381048958
2015	188.0689023667419
2016	186.49725348581757
2017	183.07379020545193
2018	175.14216507643056
2019	183.3340200496089
2020	200.16312796196615
2021	235.18833268966065