Year	Percent
1996-01-01	3.9116000000000000
1997-01-01	2.5803100000000000
1998-01-01	1.3623900000000000
1999-01-01	1.0597800000000000
2000-01-01	1.7736599999999998
2001-01-01	2.0117800000000000
2002-01-01	2.1661200000000003
2003-01-01	2.4534200000000000
2004-01-01	2.8266100000000000
2005-01-01	3.0335200000000000
2006-01-01	3.5426699999999998
2007-01-01	3.5624100000000000
2008-01-01	3.4951700000000000
2009-01-01	3.2381000000000000
2010-01-01	3.2437900000000000
2011-01-01	2.8849900000000000
2012-01-01	2.9341400000000000
2013-01-01	2.7996600000000000
2014-01-01	2.9497299999999997
2015-01-01	2.7166900000000003
2016-01-01	2.9380800000000000