Year	Percent
1996-01-01	1.9731800000000000
1997-01-01	2.2198400000000000
1998-01-01	2.2995700000000000
1999-01-01	2.4540900000000003
2000-01-01	2.6566400000000003
2001-01-01	2.6632599999999997
2002-01-01	2.4099900000000000
2003-01-01	2.3175900000000000
2004-01-01	2.7981900000000000
2005-01-01	3.6615000000000000
2006-01-01	3.6851700000000000
2007-01-01	3.0763900000000000
2008-01-01	3.1384800000000000
2009-01-01	3.0424200000000000
2010-01-01	3.0337400000000003
2011-01-01	3.0645900000000000
2012-01-01	2.9314000000000000
2013-01-01	3.0268200000000003
2014-01-01	2.6854100000000000
2015-01-01	2.3523700000000000
2016-01-01	2.3384099999999997