Year	current US$
2000	28.10793712541565
2001	28.60408854063606
2002	30.911887147453808
2003	34.04558639131408
2004	37.47720588669854
2005	42.06992743097114
2006	46.39290592528578
2007	52.50551745338442
2008	63.97110441879864
2009	70.73663244842552
2010	80.16217178120868
2011	97.43797709674209
2012	108.3911421420066
2013	118.52387355658126
2014	124.01675282465166
2015	127.45104085866241
2016	134.8182711887192
2017	151.84945539566806
2018	172.77192491635947
2019	185.91070942001218
2020	203.40312647110312
2021	234.98909298075134