Year	current US$
2000	174.57620888
2001	162.1682117
2002	93.90249286
2003	81.20367824
2004	90.49195377
2005	114.4039992
2006	117.82655867
2007	133.75946834
2008	171.07578914
2009	169.67448651
2010	211.41435776
2011	239.39220509
2012	246.08786354
2013	265.53410778
2014	253.01594008
2015	238.64231784
2016	239.11643088
2017	273.18036346
2018	275.70765463
2019	259.30380229
2020	239.69290832
2021	250.13733709