Year	Percent
1999-01-01	5.1620200000000000
2000-01-01	5.1225200000000000
2001-01-01	4.4721800000000010
2002-01-01	4.4937100000000000
2003-01-01	4.6845200000000000
2004-01-01	7.4858800000000000
2005-01-01	6.1540099999999995
2006-01-01	5.6287100000000000
2007-01-01	5.8815900000000000
2008-01-01	5.3408400000000000
2009-01-01	4.8832400000000000
2010-01-01	5.1469500000000000
2011-01-01	6.1427000000000000
2012-01-01	5.6521800000000000
2013-01-01	5.8079900000000000
2014-01-01	6.3978000000000000
2015-01-01	5.4857800000000000
2016-01-01	7.2156199999999995