Year	current US$
2000	43.78394054659381
2001	44.35945209534691
2002	43.525200404835836
2003	47.425379988032304
2004	54.3495604771614
2005	63.38496541719547
2006	70.94352988644071
2007	83.4830802639403
2008	96.25745314623775
2009	95.88504637154914
2010	110.68522915675509
2011	126.86100040834414
2012	133.12426214285733
2013	140.6585746033491
2014	141.39057079098887
2015	133.10910582494319
2016	135.02397241074968
2017	149.29676015419716
2018	157.55895177103108
2019	162.1475736199342
2020	160.00044110715905
2021	183.67551201572874