Year	current US$
2000	444.56890869
2001	438.06173706
2002	462.62939453
2003	480.22979736
2004	488.82836914
2005	553.5333252
2006	684.95202637
2007	703.309021
2008	875.10992432
2009	865.84637451
2010	856.67333984
2011	907.03131104
2012	867.37713623
2013	924.61462402
2014	947.63323975
2015	1026.50805664
2016	1144.53564453
2017	1167.66101074
2018	1103.17370605
2019	1204.34094238
2020	1050.64367676
2021	1114.37426758