Year	current US$
2000	117.93763583
2001	117.87628419
2002	134.99979848
2003	145.30402585
2004	154.42052695
2005	173.11705671
2006	183.72566574
2007	207.73132646
2008	234.33815536
2009	188.9329207
2010	165.95831308
2011	177.49514107
2012	197.83497007
2013	190.50117538
2014	194.31573042
2015	187.08229045
2016	187.75171724
2017	194.56626606
2018	195.50795801
2019	194.79392913
2020	164.53323162
2021	191.46786394