Year	current US$
2000	115.9647522
2001	116.41130829
2002	132.39851379
2003	157.65351868
2004	184.65751648
2005	192.0113678
2006	203.08328247
2007	229.03910828
2008	312.62826538
2009	301.46151733
2010	357.00109863
2011	385.77191162
2012	387.2303772
2013	440.10235596
2014	544.39526367
2015	515.37243652
2016	539.51226807
2017	594.62731934
2018	641.56152344
2019	670.97399902
2020	569.434021
2021	564.90075684