Year	Percent
1991-01-01	15.2400000000000000
1992-01-01	11.6400000000000000
1993-01-01	15.8500000000000000
1994-01-01	14.9800000000000000
1995-01-01	15.7400000000000000
1996-01-01	9.8225000000000000
1997-01-01	7.6083300000000005
1998-01-01	7.9975000000000000
1999-01-01	8.9783300000000000
2000-01-01	9.1458300000000000
2001-01-01	8.6583300000000000
2002-01-01	9.5150000000000000
2003-01-01	10.8942000000000000
2004-01-01	11.5167000000000000
2005-01-01	10.2458000000000000
2006-01-01	9.6458300000000000
2007-01-01	8.8650000000000000
2008-01-01	9.5975000000000000
2009-01-01	10.3233000000000000
2010-01-01	7.2808300000000000
2011-01-01	7.6758300000000000
2012-01-01	7.9883300000000000
2013-01-01	7.5715400000000000
2014-01-01	7.1758300000000000
2015-01-01	8.3158300000000000
2016-01-01	7.9033300000000000