Year	current US$
2000	23.097672797882893
2001	23.35717880063525
2002	23.238097241729065
2003	30.254723275250043
2004	35.25744450078806
2005	41.077555506501085
2006	48.71479140386211
2007	57.69527737070818
2008	66.88571407945678
2009	61.633639629930244
2010	67.12695454905294
2011	72.621634092334
2012	75.65487691750326
2013	81.29210762397291
2014	80.31990265424979
2015	72.16346682675102
2016	70.27688347703301
2017	68.7589981711175
2018	73.33408602465249
2019	73.44830720152702
2020	75.18372788100254
2021	82.12692052190438