Year	current US$
2000	189.61275396
2001	194.17427611
2002	230.31304594
2003	382.73750077
2004	425.59593704
2005	533.74321602
2006	577.6774005
2007	562.20531516
2008	668.93341302
2009	698.89574421
2010	708.19275268
2011	758.72899451
2012	713.1117784
2013	745.64301704
2014	747.85588517
2015	616.25961566
2016	618.73836048
2017	631.71701466
2018	652.73582098
2019	662.77266951
2020	666.58108854
2021	722.98311144