Year	Percent
1996-01-01	3.6303500000000000
1997-01-01	3.7735600000000000
1998-01-01	5.3403400000000000
1999-01-01	3.7972699999999997
2000-01-01	3.8303199999999995
2001-01-01	3.1313500000000000
2002-01-01	3.0195500000000000
2003-01-01	3.2754700000000000
2004-01-01	2.9766500000000000
2005-01-01	2.8583800000000000
2006-01-01	3.2222100000000000
2007-01-01	2.8907000000000000
2008-01-01	2.8875100000000000
2009-01-01	3.1013000000000000
2010-01-01	3.3376600000000000
2011-01-01	3.5239599999999998
2012-01-01	3.4554000000000000
2013-01-01	3.3424800000000000
2014-01-01	3.3254400000000000
2015-01-01	3.0720800000000000
2016-01-01	2.9928700000000000