Year	Percent
1992-01-01	1.2491100000000000
1993-01-01	1.3103799999999999
1994-01-01	1.2161400000000000
1995-01-01	1.4038500000000000
1996-01-01	1.4579000000000000
1997-01-01	1.3614500000000000
1998-01-01	1.2586600000000001
1999-01-01	1.2131600000000000
2000-01-01	1.1909100000000001
2001-01-01	1.2478900000000000
2002-01-01	1.5098300000000000
2003-01-01	1.6687299999999998
2004-01-01	1.7111299999999998
2005-01-01	1.7984500000000000
2006-01-01	1.7862200000000001
2007-01-01	1.7358300000000000
2008-01-01	1.4866500000000000
2009-01-01	1.4673000000000000
2010-01-01	1.4162700000000001
2011-01-01	1.3942700000000001
2012-01-01	1.3860299999999999
2013-01-01	1.3265500000000000
2014-01-01	1.3012900000000000
2015-01-01	1.2605000000000000