Year	current US$
2000	24.13679314
2001	25.45506668
2002	26.28294373
2003	33.58860016
2004	36.898983
2005	40.90756226
2006	48.03204346
2007	55.67542648
2008	66.46580505
2009	62.60401154
2010	64.44327545
2011	61.27024841
2012	70.12895966
2013	74.30075836
2014	75.41601563
2015	63.30020905