Year	current US$
2000	59.30676366678446
2001	58.89712342929218
2002	57.26398282996149
2003	64.06089563784758
2004	73.53413561457457
2005	85.8621067849039
2006	98.32137922677065
2007	117.14032626622185
2008	138.50672155278892
2009	145.21312370124562
2010	167.55102673555373
2011	194.0240620200044
2012	205.92148593382322
2013	221.10377077736285
2014	228.47194966236268
2015	223.21271276209023
2016	222.13144115241133
2017	238.8039689414732
2018	250.50148482554616
2019	257.0576554612094
2020	260.7397803269507
2021	294.47439968413585