Year	current US$
2000	9.04719516
2001	10.79977993
2002	10.89492045
2003	13.31437928
2004	12.89117402
2005	12.56240749
2006	13.40347204
2007	20.70431751
2008	13.58624864
2009	13.21871086
2010	6.7835661
2011	10.32289777
2012	6.57286773
2013	5.94718413
2014	27.60935398
2015	8.43504286
2016	4.92757879
2017	4.55262789
2018	7.16109655
2019	8.75027674
2020	8.14480509
2021	8.91192568