Year	Percent
1999-01-01	4.6421900000000000
2000-01-01	4.6222800000000000
2001-01-01	2.1528200000000000
2002-01-01	2.1523400000000000
2003-01-01	2.2527600000000000
2004-01-01	2.1116500000000000
2005-01-01	2.4611400000000003
2006-01-01	3.3052300000000003
2007-01-01	3.8530599999999997
2008-01-01	3.4915800000000004
2009-01-01	4.6605700000000000
2010-01-01	4.8062000000000000
2011-01-01	4.1392000000000000
2012-01-01	4.0464800000000000
2013-01-01	4.0777900000000000
2014-01-01	4.7131800000000000
2015-01-01	5.2007200000000000
2016-01-01	4.7953000000000000