Year	current US$
2000	267.67646261942554
2001	269.53446957021566
2002	300.2889763501041
2003	378.3489476930523
2004	441.5468873146142
2005	455.87662910398797
2006	493.64421393882685
2007	557.9561970250662
2008	634.0118690181984
2009	604.5692257542795
2010	591.0192225390019
2011	641.7160631371728
2012	603.3447636225484
2013	628.0745022322012
2014	639.5293155766523
2015	549.5586741433872
2016	554.0694629868274
2017	586.0293695470695
2018	630.6183256508788
2019	620.99621131308
2020	607.0183653447087
2021	684.4420026566653