Year	2011 U.S. Dollars
1995-01-01	18.59
1996-01-01	19.38
1997-01-01	19.30
1998-01-01	19.39
1999-01-01	19.99
2000-01-01	20.95
2001-01-01	22.58
2002-01-01	22.94
2003-01-01	24.13
2004-01-01	25.19
2005-01-01	26.34
2006-01-01	28.11
2007-01-01	29.35
2008-01-01	29.46
2009-01-01	29.00
2010-01-01	29.79
2011-01-01	30.55