Year	current US$
2000	148.1732400513928
2001	144.92944183611345
2002	126.29978934169533
2003	132.88533704399956
2004	148.40637111979544
2005	183.59768696772417
2006	210.50426405660028
2007	247.820073593613
2008	277.086928306525
2009	265.9966320014869
2010	310.9334111377703
2011	350.11959898074736
2012	349.6280200882432
2013	356.8635640090342
2014	359.4020481773341
2015	313.0773347266412
2016	305.06441488760726
2017	352.09939981324175
2018	330.3521080528136
2019	323.93971774441906
2020	270.16844403916514
2021	304.0420004150284