Year	Percent
1996-01-01	42.3699
1997-01-01	46.7548
1998-01-01	55.7597
1999-01-01	55.5124
2000-01-01	60.6344
2001-01-01	56.0296
2002-01-01	60.7980
2003-01-01	61.5604
2004-01-01	53.8813
2005-01-01	50.3374
2006-01-01	51.3089
2007-01-01	68.6649
2008-01-01	74.6425
2009-01-01	70.8437
2010-01-01	85.7204
2011-01-01	75.4725
2012-01-01	51.6580
2013-01-01	55.5661
2014-01-01	52.1319