Year	current US$
2000	29.29710402
2001	29.99729467
2002	34.11453151
2003	43.56516259
2004	52.17128755
2005	57.84362838
2006	64.62522092
2007	75.29268879
2008	86.36867967
2009	90.16446105
2010	93.63910511
2011	97.11600326
2012	90.75419059
2013	92.86408084
2014	92.61054709
2015	79.55576821
2016	79.04769696
2017	79.84665023
2018	82.35392793
2019	81.7285313
2020	84.37316876
2021	98.96273627