Year	Percent
1991-01-01	1.7315099999999999
1992-01-01	1.5364600000000000
1993-01-01	1.5460900000000000
1994-01-01	1.5658900000000000
1995-01-01	1.4443900000000000
1996-01-01	1.1446700000000000
1997-01-01	1.4418799999999998
1998-01-01	1.3264600000000000
1999-01-01	1.4709500000000000
2000-01-01	1.4890000000000000
2001-01-01	1.5279000000000000
2002-01-01	1.6204900000000000
2003-01-01	1.6950900000000002
2004-01-01	1.6293100000000000
2005-01-01	1.6468000000000000
2006-01-01	1.6090500000000000
2007-01-01	1.5662900000000000
2008-01-01	1.5017700000000000
2009-01-01	1.4907100000000000
2010-01-01	1.3846800000000000
2011-01-01	1.2369600000000000
2012-01-01	1.1676200000000000
2013-01-01	1.1284000000000000
2014-01-01	1.0823900000000000
2015-01-01	1.1230000000000000
2016-01-01	1.2182899999999999