Year	Percent
1996-01-01	2.9838800000000000
1997-01-01	2.5196099999999997
1998-01-01	2.2666900000000000
1999-01-01	1.8918099999999998
2000-01-01	2.0594099999999997
2001-01-01	2.1899400000000000
2002-01-01	1.3761700000000001
2003-01-01	1.6752300000000000
2004-01-01	2.5266200000000000
2005-01-01	3.8176500000000000
2006-01-01	2.3615700000000000
2007-01-01	2.1358900000000003
2008-01-01	1.8531099999999998
2009-01-01	1.6503500000000000
2010-01-01	1.5674700000000001
2011-01-01	1.4324400000000000
2012-01-01	1.4466400000000000
2013-01-01	1.2996500000000000
2014-01-01	1.3251300000000000
2015-01-01	1.1260600000000000
2016-01-01	1.1485700000000000