Year	Percent
1993-01-01	4.1603800000000000
1994-01-01	2.9675800000000000
1995-01-01	2.9950500000000000
1996-01-01	2.7558400000000000
1997-01-01	2.5171200000000002
1998-01-01	2.8479600000000000
1999-01-01	2.8220900000000000
2000-01-01	2.4316400000000002
2001-01-01	2.2095100000000000
2002-01-01	1.8969700000000000
2003-01-01	1.6752799999999999
2004-01-01	1.6152500000000000
2005-01-01	1.5081500000000000
2006-01-01	1.4848299999999999
2007-01-01	1.4377700000000000
2008-01-01	1.3166500000000000
2009-01-01	1.2503200000000000
2010-01-01	1.2445000000000000
2011-01-01	1.2221000000000000
2012-01-01	1.2541100000000000
2013-01-01	1.2168400000000000
2014-01-01	1.1392000000000000
2015-01-01	1.1412799999999999
2016-01-01	1.1370799999999999