Year	current US$
2000	84.1325766
2001	84.6775905
2002	90.47061488
2003	95.66607101
2004	97.92449661
2005	111.01147352
2006	121.61520072
2007	142.74216609
2008	163.72305094
2009	152.38634737
2010	179.72975215
2011	220.25019605
2012	227.15442429
2013	236.57313541
2014	238.26858198
2015	238.86054565
2016	232.03214677
2017	225.70770558
2018	249.01157838
2019	251.25545706
2020	267.41404827
2021	284.08850996