Year	current US$
2000	117.02334324
2001	117.43534263
2002	127.11376275
2003	178.74447082
2004	169.3292867
2005	158.5062441
2006	158.14240922
2007	208.06664837
2008	207.05927581
2009	223.66580978
2010	231.71811163
2011	241.48148733
2012	276.30638038
2013	299.11743193
2014	293.74837384
2015	293.75472523
2016	311.07336472
2017	351.54271804
2018	314.75591259
2019	307.10566954
2020	290.10705631
2021	264.31957476