Year	current US$
2000	64.10726600174087
2001	65.39124438803772
2002	65.57781308079501
2003	64.01661482417423
2004	71.99375414539338
2005	81.13801782973633
2006	86.47592801037983
2007	103.28102245779687
2008	124.68348121269719
2009	134.10804398854074
2010	153.83398225092537
2011	170.35426429671742
2012	182.0254842467246
2013	177.7090971119819
2014	172.61058218489822
2015	173.64652973206876
2016	186.28212770091878
2017	193.9018768024503
2018	207.3557957693426
2019	197.2901154122912
2020	179.55264121817012
2021	192.9438414493355