Year	current US$
2000	263.67974854
2001	270.07980347
2002	321.00622559
2003	354.66384888
2004	426.36782837
2005	523.75091553
2006	561.19958496
2007	657.96405029
2008	740.36676025
2009	764.35394287
2010	811.32800293
2011	857.57232666
2012	878.45526123
2013	951.98162842
2014	990.25134277
2015	1039.05749512
2016	1041.01623535
2017	1058.94311523
2018	1055.90356445
2019	1071.89624023
2020	1045.72900391
2021	1125.39733887