Year	Percent
1991-01-01	2.5000
1992-01-01	11.0000
1993-01-01	11.9967
1994-01-01	12.0000
1995-01-01	11.6700
1996-01-01	11.0000
1997-01-01	11.0000
1998-01-01	11.4900
1999-01-01	18.5833
2000-01-01	20.0000
2001-01-01	19.6667
2002-01-01	23.3333
2003-01-01	23.9167
2004-01-01	21.3958
2005-01-01	22.0833
2006-01-01	25.0000
2007-01-01	23.5000
2008-01-01	19.3333
2009-01-01	21.5250
2010-01-01	19.6125