Year	Percent
1998-01-01	25.000000000000000
1999-01-01	13.040700000000000
2000-01-01	25.000000000000000
2001-01-01	50.000000000000000
2002-01-01	50.000000000000000
2003-01-01	50.000000000000000
2004-01-01	50.000000000000000
2005-01-01	6.520569999999999
2006-01-01	14.968200000000000
2007-01-01	23.644000000000002
2008-01-01	18.805700000000000
2009-01-01	27.697900000000000
2010-01-01	34.171100000000000
2011-01-01	42.540300000000000
2012-01-01	60.841200000000000
2013-01-01	81.016400000000000
2014-01-01	80.956800000000000