Year	current US$
2000	63.39167932894334
2001	64.40233306186592
2002	58.91100888554594
2003	66.11579125487351
2004	74.65848269028079
2005	85.03479917267083
2006	93.93226107181387
2007	108.9144939225583
2008	120.28911184972533
2009	120.61194251139537
2010	138.3348717965257
2011	154.26903241324084
2012	160.87306664421402
2013	167.20413704560391
2014	166.51164348142032
2015	164.8971877307554
2016	162.8700358718659
2017	168.37114858870294
2018	167.36389186830777
2019	165.97481685514012
2020	167.2187746845713
2021	190.7697075199471