Year	US Dollars
1995	19.02
1996	18.1
1997	18.35
1998	18.6
1999	18.56
2000	18.15
2001	18.28
2002	18.67
2003	18.67
2004	18.28
2005	18.83
2006	19.81
2007	20.14
2009	21.63
2010	22.31
2011	23.22
2012	25.71
2013	25.91
2014	26.39
2015	26.42
2016	27.08