Year	Percent
1996-01-01	15.9834
1997-01-01	17.6699
1998-01-01	16.0323
1999-01-01	13.2639
2000-01-01	14.6517
2001-01-01	14.4822
2002-01-01	14.5232
2003-01-01	14.5706
2004-01-01	18.1918
2005-01-01	27.5370
2006-01-01	21.0694
2007-01-01	20.7560
2008-01-01	16.5462
2009-01-01	10.7986
2010-01-01	10.7469
2011-01-01	11.6209
2012-01-01	12.1217
2013-01-01	13.1398
2014-01-01	14.5301
2015-01-01	14.7648
2016-01-01	11.8329