Year	current US$
2000	29091.27770037056
2001	27748.86626858107
2002	26933.272561676906
2003	28612.659526478303
2004	32571.260168493085
2005	35772.772429215605
2006	38567.60100766429
2007	38298.29042625699
2008	38058.27567428479
2009	27082.114973651398
2010	30466.452539211212
2011	35985.48222920548
2012	39212.051068137
2013	40608.35506400512
2014	41970.94538158711
2015	38036.41730154395
2016	37885.642214276035
2017	39650.73806132685
2018	42283.67913805938
2019	41217.325314866044
2020	34318.677221496924