Year	current US$
2000	42.57900311246337
2001	44.2043889209892
2002	43.21300907808252
2003	41.241524383194545
2004	47.222089741218305
2005	53.890946121862804
2006	57.90240260090089
2007	69.77625421339071
2008	84.74579517518568
2009	95.40126957718026
2010	111.37150921395522
2011	122.66554710673978
2012	128.83548684192712
2013	117.80731237155885
2014	107.65777689579544
2015	111.71789204347525
2016	112.66602119543477
2017	109.50081495343632
2018	111.10250432168371
2019	108.96241467178062
2020	103.27105969054358
2021	108.53581978260978