Year	Percent
1996-01-01	8.1840200000000000
1997-01-01	7.0592700000000000
1998-01-01	6.3680900000000005
1999-01-01	4.9164000000000000
2000-01-01	5.3955300000000000
2001-01-01	5.3570800000000010
2002-01-01	4.9545699999999995
2003-01-01	4.2879500000000000
2004-01-01	3.2132600000000000
2005-01-01	2.2672300000000000
2006-01-01	2.0952300000000000
2007-01-01	2.0284500000000000
2008-01-01	1.7292599999999998
2009-01-01	1.6316500000000000
2010-01-01	1.4987700000000002
2011-01-01	1.6074600000000000
2012-01-01	1.6006300000000000
2013-01-01	1.8141900000000002
2014-01-01	1.5683500000000000
2015-01-01	1.1769600000000000
2016-01-01	1.3279600000000000