Year	Percent
1990-01-01	2.0503500000000000
1991-01-01	1.9336200000000001
1992-01-01	1.9096799999999998
1993-01-01	2.1443500000000000
1994-01-01	2.3640000000000000
1995-01-01	2.2615000000000000
1996-01-01	1.7194300000000000
1997-01-01	1.7476700000000000
1998-01-01	1.5938000000000000
1999-01-01	1.5593700000000001
2000-01-01	1.3634500000000000
2001-01-01	1.3437299999999999
2002-01-01	1.5643100000000000
2003-01-01	1.5490700000000002
2004-01-01	1.4795700000000000
2005-01-01	1.4577600000000000
2006-01-01	1.4840400000000000
2007-01-01	1.4037300000000000
2008-01-01	1.4075700000000000
2009-01-01	1.3822500000000000
2010-01-01	1.6122900000000000
2011-01-01	1.6042000000000000
2012-01-01	1.6088600000000000
2013-01-01	1.3227500000000000
2014-01-01	1.3433200000000000
2015-01-01	1.2752000000000000
2016-01-01	1.1445299999999998