Year	current US$
2000	113.66057494
2001	101.56847521
2002	89.43617256
2003	88.79424981
2004	104.11131102
2005	137.60440664
2006	166.32914549
2007	198.77507941
2008	217.77422856
2009	224.53530937
2010	262.63763767
2011	301.2245589
2012	283.07844609
2013	275.52012698
2014	285.62608617
2015	193.34075792
2016	194.37260965
2017	229.34844796
2018	214.31223565
2019	211.58640893
2020	160.53496563
2021	172.44301997