Year	US Dollars
1996	11.17
1997	12.07
1998	12.49
1999	12.71
2000	13.58
2001	14.26
2002	15.12
2003	15.49
2004	16.39
2005	17.57
2006	18.48
2007	19.55
2008	20.99
2009	22.87
2010	22.87
2011	24.33
2012	23.77
2013	23.72
2014	23.25
2015	23.65
2016	24.28