Year	current US$
2000	134.28443909
2001	138.02864075
2002	131.76092529
2003	129.33969116
2004	159.20832825
2005	209.22647095
2006	239.64555359
2007	309.1078186
2008	378.67913818
2009	383.54962158
2010	452.0512085
2011	501.29830933
2012	546.21148682
2013	579.87963867
2014	586.87640381
2015	468.60543823
2016	447.06994629
2017	495.27026367
2018	517.15844727
2019	500.73138428
2020	462.2328186
2021	557.53948975