Year	current US$
2000	28.474140836145878
2001	29.687192536151045
2002	29.498568890348704
2003	32.23869925365141
2004	36.020959760206395
2005	42.21558413735144
2006	46.85936805218717
2007	53.351289437083366
2008	60.34782683644311
2009	60.779268508908444
2010	68.72755528984318
2011	78.60827715115968
2012	83.75271853305911
2013	88.85191241165562
2014	89.46452011338795
2015	86.1201132418196
2016	85.67104490220511
2017	89.50241520843026
2018	94.76096450673084
2019	97.08377488315914
2020	96.5694356065212
2021	109.0650560932049