Year	current US$
2000	65.1501236
2001	73.78884125
2002	78.99478149
2003	106.29218292
2004	138.11340332
2005	152.12762451
2006	166.81382751
2007	212.61096191
2008	240.41625977
2009	239.44386292
2010	255.31819153
2011	274.77688599
2012	262.2885437
2013	278.04251099
2014	295.12359619
2015	255.35635376
2016	277.04321289
2017	297.4619751
2018	351.3012085
2019	367.75839233
2020	396.88024902
2021	464.74285889