Year	Percent
1996-01-01	0.400
1997-01-01	0.410
1998-01-01	0.465
1999-01-01	0.610
2000-01-01	0.580
2001-01-01	0.470
2002-01-01	0.550
2003-01-01	0.630
2004-01-01	1.190
2005-01-01	0.960
2006-01-01	0.970
2007-01-01	1.090
2008-01-01	0.360
2009-01-01	0.230
2010-01-01	0.300
2011-01-01	0.090
2012-01-01	0.280
2013-01-01	0.385
2014-01-01	0.360
2015-01-01	0.480