Year	Percent
2000-01-01	4.2986600000000000
2001-01-01	3.3654400000000000
2002-01-01	5.0479000000000000
2003-01-01	5.3094000000000000
2004-01-01	5.0849900000000000
2005-01-01	5.4655900000000000
2006-01-01	5.7253300000000005
2007-01-01	7.9830100000000000
2008-01-01	6.8647000000000000
2009-01-01	5.6784600000000000
2010-01-01	7.1248800000000000
2011-01-01	6.3450200000000000
2012-01-01	6.4176600000000000
2013-01-01	6.4244100000000000
2014-01-01	6.4445200000000000
2015-01-01	6.8308399999999990
2016-01-01	5.7873300000000000
2017-01-01	6.1558800000000010