Year	Percent
1996-01-01	14.5000
1997-01-01	14.2857
1998-01-01	15.3961
1999-01-01	12.2293
2000-01-01	12.1905
2001-01-01	11.0007
2002-01-01	10.0796
2003-01-01	13.6556
2004-01-01	13.4891
2005-01-01	14.8463
2006-01-01	15.5444
2007-01-01	16.6368
2008-01-01	18.4521
2009-01-01	18.3652
2010-01-01	17.2419
2011-01-01	17.9535
2012-01-01	16.5054
2013-01-01	16.7211
2014-01-01	15.8677
2015-01-01	19.3378
2016-01-01	20.8608