Year	Percent
1998-01-01	7.40000000000000000
1999-01-01	8.30000000000000000
2000-01-01	8.90000000000000000
2001-01-01	3.40000000000000000
2002-01-01	2.40000000000000000
2003-01-01	2.60000000000000000
2004-01-01	1.90000000000000000
2005-01-01	1.20000000000000000
2006-01-01	0.80000000000000000
2007-01-01	0.70000000000000000
2008-01-01	0.60000000000000000
2009-01-01	0.60000000000000000
2010-01-01	0.58800100000000000
2011-01-01	0.48415600000000003
2012-01-01	0.59429200000000000
2013-01-01	0.57068200000000000
2014-01-01	0.48782900000000000