Year	Percent
1990-01-01	2.2389900000000003
1991-01-01	2.1295500000000000
1992-01-01	2.0964099999999997
1993-01-01	2.1412400000000003
1994-01-01	2.0631700000000000
1995-01-01	2.0089099999999998
1996-01-01	2.0439800000000000
1997-01-01	2.0386900000000003
1998-01-01	2.0288300000000000
1999-01-01	1.8627200000000002
2000-01-01	1.8092900000000000
2001-01-01	1.8346700000000000
2002-01-01	2.0738900000000000
2003-01-01	2.2274200000000000
2004-01-01	2.2861500000000000
2005-01-01	2.2368000000000000
2006-01-01	2.1854500000000000
2007-01-01	2.4150700000000000
2008-01-01	2.4125099999999997
2009-01-01	2.5659200000000000
2010-01-01	2.5083599999999997
2011-01-01	2.5599400000000000
2012-01-01	2.5610900000000000
2013-01-01	2.5227100000000000
2014-01-01	2.7790200000000000
2015-01-01	2.6477700000000000
2016-01-01	2.6363500000000000