Year	current US$
2000	11.102571941679399
2001	10.362548976697084
2002	10.469806803038052
2003	17.051976484969003
2004	17.805200780678955
2005	22.09574391351948
2006	28.323451655536456
2007	30.552825595294692
2008	33.810125721253364
2009	30.812954328996682
2010	34.384249339771806
2011	36.67716793517676
2012	38.44513278395215
2013	41.726552389761636
2014	43.31209490695975
2015	41.516306261808026
2016	38.68387792194508
2017	36.900266412822376
2018	34.19827828067897
2019	33.79052816214057
2020	34.950859644047355
2021	42.75721516038803