Year	current US$
2000	79.14264943766283
2001	84.4773150309448
2002	82.9270161001656
2003	80.91293756920585
2004	87.23245997660749
2005	97.34515944686542
2006	113.16459037891649
2007	129.85137433711023
2008	153.24301118009782
2009	168.53405277478262
2010	175.82618668081233
2011	207.07077933855618
2012	216.08111694505172
2013	238.97369726977288
2014	264.3332732117124
2015	246.3729593020405
2016	277.1837806148422
2017	276.134564407045
2018	286.2630432430897
2019	284.639333580799
2020	307.4850009238823
2021	340.2576346594011