Year	current US$
2000	229.04855124
2001	208.06794542
2002	201.66119104
2003	215.99664525
2004	258.74275616
2005	303.81796086
2006	335.310136
2007	375.26586349
2008	410.33640802
2009	392.21748517
2010	460.4771657
2011	525.58706811
2012	563.03943357
2013	619.60138736
2014	601.04158524
2015	589.09983191
2016	593.96218442
2017	678.39438432
2018	716.6612915
2019	672.18128775
2020	559.77976573
2021	673.63728108
2022	625.29324326