Year	Percent
1996-01-01	6.4180199999999990
1997-01-01	6.2563400000000000
1998-01-01	7.3414899999999990
1999-01-01	7.3536000000000000
2000-01-01	5.0541900000000000
2001-01-01	8.4045700000000000
2002-01-01	7.4066199999999990
2003-01-01	7.0736100000000000
2004-01-01	7.9531199999999990
2005-01-01	7.1172800000000000
2006-01-01	7.4142000000000000
2007-01-01	7.9478399999999990
2008-01-01	7.3292800000000010
2009-01-01	6.1660200000000000
2010-01-01	5.0344300000000000
2011-01-01	4.4586200000000000
2012-01-01	4.6154699999999990
2013-01-01	4.8952300000000010
2014-01-01	4.9179300000000000
2015-01-01	3.7970800000000002
2016-01-01	3.6566300000000003