Year	Percent
1996-01-01	3.5922400000000003
1997-01-01	3.2024600000000000
1998-01-01	2.9388200000000000
1999-01-01	1.0000200000000001
2000-01-01	1.6032000000000000
2001-01-01	3.8888199999999995
2002-01-01	6.5379700000000000
2003-01-01	7.1465800000000000
2004-01-01	5.4280200000000000
2005-01-01	2.3426099999999996
2006-01-01	2.0634300000000000
2007-01-01	2.1112700000000000
2008-01-01	1.6415099999999998
2009-01-01	1.6472400000000000
2010-01-01	1.4659799999999998
2011-01-01	1.4588400000000000
2012-01-01	1.4907400000000000
2013-01-01	1.5203700000000000
2014-01-01	1.4139500000000000
2015-01-01	1.3369900000000000
2016-01-01	1.3478400000000000