Year	Percent
1997-01-01	0.48099300000000000
1998-01-01	0.47331599999999996
1999-01-01	0.46398500000000004
2000-01-01	0.56495200000000000
2001-01-01	0.76725900000000000
2002-01-01	0.40708300000000000
2003-01-01	0.38109499999999996
2004-01-01	0.42228400000000000
2005-01-01	0.15536600000000000
2006-01-01	0.16533200000000000
2007-01-01	0.20550700000000002
2008-01-01	0.31479000000000000
2009-01-01	0.20884699999999998
2010-01-01	0.25044299999999997
2011-01-01	0.26193200000000000
2012-01-01	0.37002500000000000
2013-01-01	0.38804900000000000
2014-01-01	0.37013100000000000
2015-01-01	0.58081300000000000