Year	Percent
1996-01-01	9.14
1997-01-01	9.28
1998-01-01	9.04
1999-01-01	10.21
2000-01-01	13.27
2001-01-01	8.98
2002-01-01	8.83
2003-01-01	11.68
2004-01-01	13.87
2005-01-01	13.73
2006-01-01	16.28
2007-01-01	15.71
2008-01-01	5.63
2009-01-01	3.41
2010-01-01	4.65
2011-01-01	2.19
2012-01-01	5.36
2013-01-01	6.91
2014-01-01	7.33
2015-01-01	6.87