Year	current US$
2000	104.22499231
2001	94.55888846
2002	91.98346994
2003	135.8142313
2004	169.65049936
2005	167.72772229
2006	167.39613057
2007	203.49751053
2008	172.18558217
2009	147.56035934
2010	214.04525602
2011	236.88011933
2012	232.8974269
2013	228.42119733
2014	215.31113345
2015	209.18863945
2016	201.75256066
2017	221.16296119
2018	220.09914492
2019	204.30330752
2020	187.86726938
2021	216.62230016