Year	Percent
1996-01-01	3.3343300000000005
1997-01-01	3.3984300000000003
1998-01-01	3.4300800000000002
1999-01-01	3.1658000000000000
2000-01-01	3.3478800000000004
2001-01-01	3.5936900000000000
2002-01-01	3.6891000000000000
2003-01-01	3.5158600000000000
2004-01-01	3.5382100000000000
2005-01-01	3.5551600000000000
2006-01-01	3.6876400000000000
2007-01-01	3.5319800000000003
2008-01-01	3.2560500000000000
2009-01-01	3.0673200000000000
2010-01-01	2.9232099999999996
2011-01-01	2.8680900000000000
2012-01-01	2.7611500000000000
2013-01-01	2.7247000000000000
2014-01-01	2.6781599999999997
2015-01-01	2.5869800000000000
2016-01-01	2.7786400000000000