Year	current US$
2000	53.43399048
2001	55.31956482
2002	62.69612503
2003	68.08676147
2004	102.73557281
2005	108.33146667
2006	149.31607056
2007	134.67384338
2008	191.0229187
2009	117.48226929
2010	166.60621643
2011	155.88771057
2012	207.00796509
2013	163.80981445
2014	202.63577271
2015	169.94888306
2016	191.9367218
2017	212.57102966
2018	219.28793335
2019	229.94410706
2020	246.840271
2021	279.24603271