Year	2011 U.S. Dollars
1995-01-01	39.88
1996-01-01	39.95
1997-01-01	40.39
1998-01-01	41.99
1999-01-01	42.72
2000-01-01	43.86
2001-01-01	44.25
2002-01-01	45.10
2003-01-01	45.42
2004-01-01	46.17
2005-01-01	47.19
2006-01-01	48.76
2007-01-01	49.82
2008-01-01	50.03
2009-01-01	49.79
2010-01-01	50.83
2011-01-01	51.45