Year	US Dollars
2000	25.44
2001	25.57
2002	26.74
2003	27.89
2004	28.63
2005	28.98
2006	30.08
2007	30.13
2008	30.9
2009	33.01
2010	33.41
2011	34.57
2012	36.5
2013	38.39
2014	39.31
2015	40.55
2016	40.85