Year	current US$
2000	52.24892807
2001	56.52495956
2002	56.94697189
2003	60.82196045
2004	65.1476593
2005	72.13689423
2006	77.76139832
2007	92.0919342
2008	107.06826019
2009	110.52922058
2010	115.32395172
2011	122.53475952
2012	130.77900696
2013	137.09841919
2014	152.6446991
2015	161.27700806
2016	167.37036133
2017	177.15000916
2018	168.44512939
2019	161.98634338
2020	161.19981384
2021	198.07792664