Year	current US$
2000	176.23924639367937
2001	156.8891446444939
2002	131.90410318140175
2003	57.367761952091826
2004	144.59007607982522
2005	150.0645712693204
2006	182.52997646994427
2007	201.6839404889651
2008	247.8357872387965
2009	241.2243111004749
2010	273.76319165296337
2011	333.95849156189087
2012	332.2383300097236
2013	377.31019772405523
2014	351.25559293246357
2015	382.9948723053299
2016	375.9273126680602
2017	358.47920206372135
2018	391.29704517713554
2019	356.8761981896135
2020	332.0529450580826
2021	343.42453017829115