Year	current US$
2000	370.42074585
2001	371.98947144
2002	356.13839722
2003	370.92379761
2004	391.91143799
2005	459.89138794
2006	536.68743896
2007	560.90765381
2008	562.85314941
2009	646.33703613
2010	655.11743164
2011	826.34002686
2012	959.83081055
2013	1059.09423828
2014	1230.84533691
2015	1198.33630371
2016	1243.94177246
2017	1261.1652832
2018	1291.12866211
2019	1279.6907959
2020	1355.71655273
2021	1441.9987793