Year	current US$
2000	59.71682
2001	56.8305845
2002	59.23261677
2003	68.18046061
2004	75.26234176
2005	82.59288829
2006	92.1887071
2007	108.1690923
2008	123.18431367
2009	108.81672932
2010	133.79999561
2011	160.46049399
2012	171.28014859
2013	176.1689907
2014	188.14436518
2015	173.48104784
2016	173.16243758
2017	178.88987998
2018	202.92738875
2019	203.75219021
2020	193.73566413
2021	213.2246182