Year	current US$
2000	26.41833878
2001	25.91971779
2002	29.04701042
2003	26.00562286
2004	32.62977219
2005	37.02750015
2006	49.59525681
2007	66.23542023
2008	97.28814697
2009	76.66015625
2010	99.48032379
2011	136.04824829
2012	169.84095764
2013	180.84199524
2014	177.31834412
2015	165.84915161
2016	169.03985596
2017	160.92108154
2018	188.86265564
2019	197.55195618
2020	188.57124329
2021	315.57980347