Year	Percent
1998-01-01	0.44017600000000000
1999-01-01	0.42265600000000003
2000-01-01	0.46860600000000000
2001-01-01	0.42008599999999996
2002-01-01	0.41397100000000000
2003-01-01	0.43031899999999995
2004-01-01	0.43355200000000005
2005-01-01	0.44998500000000000
2006-01-01	0.44533100000000003
2007-01-01	0.47740900000000003
2008-01-01	0.42954799999999993
2009-01-01	0.47673500000000000
2010-01-01	0.46882100000000000
2011-01-01	0.48180400000000000
2012-01-01	0.42984500000000000
2013-01-01	0.47222500000000000
2014-01-01	0.40883800000000003
2015-01-01	0.44911400000000000