Year	Percent
1996-01-01	5.5488100000000000
1997-01-01	4.8811500000000000
1998-01-01	5.7003100000000000
1999-01-01	7.3347300000000000
2000-01-01	8.9896100000000000
2001-01-01	2.6491400000000000
2002-01-01	2.6491400000000000
2003-01-01	2.6491400000000000
2004-01-01	2.6491400000000000
2005-01-01	8.1509000000000000
2006-01-01	4.4004600000000000
2007-01-01	4.0977600000000000
2008-01-01	3.2187799999999998
2009-01-01	3.4531000000000000
2010-01-01	3.9505000000000000
2011-01-01	4.7724000000000000
2012-01-01	3.9239100000000000
2013-01-01	3.8874500000000000
2014-01-01	4.0339199999999990
2015-01-01	3.1789400000000003
2016-01-01	3.4630600000000000