Year	Percent
1996-01-01	111.07
1997-01-01	139.06
1998-01-01	158.07
1999-01-01	167.28
2000-01-01	178.03
2001-01-01	183.50
2002-01-01	174.76
2003-01-01	186.68
2004-01-01	186.68
2005-01-01	186.68
2006-01-01	186.68
2007-01-01	186.68
2008-01-01	178.58