Year	current US$
2000	34.96939805
2001	41.35377446
2002	49.7826794
2003	66.41870354
2004	79.89461689
2005	94.58348043
2006	109.71929484
2007	151.32845795
2008	233.82108886
2009	217.06531642
2010	215.7325711
2011	239.7232483
2012	219.59412974
2013	220.38641036
2014	220.81325899
2015	195.32583337
2016	205.29975074
2017	221.88162757
2018	248.72089418
2019	254.09474096
2020	244.31426076
2021	317.97248984