Year	current US$
2000	109.87869837
2001	84.06951261
2002	101.72137312
2003	72.80430554
2004	94.46599789
2005	93.82108864
2006	88.73376242
2007	126.24470727
2008	149.22807097
2009	131.23795684
2010	147.31263366
2011	162.87752377
2012	149.28616553
2013	152.88172365
2014	152.80240392
2015	180.70217607
2016	182.10039043
2017	214.3664359
2018	217.55883592
2019	223.84369714
2020	221.48585277
2021	265.16850808