Year	Percent
1992-01-01	2.9261400000000000
1993-01-01	2.9236100000000000
1994-01-01	2.9268099999999997
1995-01-01	2.6373800000000000
1996-01-01	2.6614800000000000
1997-01-01	3.0136000000000000
1998-01-01	3.0224900000000003
1999-01-01	3.1065500000000000
2000-01-01	3.2130099999999997
2001-01-01	2.9319400000000000
2002-01-01	2.8125100000000000
2003-01-01	2.7536600000000000
2004-01-01	2.9263200000000000
2005-01-01	2.9858400000000000
2006-01-01	3.0050200000000000
2007-01-01	3.1800400000000000
2008-01-01	3.0980800000000000
2009-01-01	3.3740900000000003
2010-01-01	3.1952599999999998
2011-01-01	2.9929300000000000
2012-01-01	2.8972800000000000
2013-01-01	2.9045300000000000
2014-01-01	3.0684700000000000
2015-01-01	3.1947900000000002
2016-01-01	3.1906500000000000