Year	current US$
2000	28.10675300673608
2001	28.602937753069238
2002	30.9104268050908
2003	34.04408697700708
2004	37.475626336334194
2005	42.068139300926056
2006	46.39089053866313
2007	52.50337886034248
2008	63.96898462234717
2009	70.73439666005548
2010	80.15999801095371
2011	97.43587528143622
2012	108.3886852305582
2013	118.52082390615844
2014	124.01345871570898
2015	127.4471912065852
2016	134.81408829874226
2017	151.84526531743512
2018	172.76819168415818
2019	185.90720594434242
2020	203.399671945723
2021	234.98614506440074