Year	Percent
1996-01-01	45.6577
1997-01-01	49.3309
1998-01-01	45.7128
1999-01-01	41.5599
2000-01-01	58.0709
2001-01-01	64.8566
2002-01-01	51.1498
2003-01-01	47.2937
2004-01-01	46.5087
2005-01-01	38.6386
2006-01-01	42.3787
2007-01-01	47.3518
2008-01-01	68.9329
2009-01-01	61.3624
2010-01-01	58.4357
2011-01-01	50.2619
2012-01-01	50.2534
2013-01-01	45.8537
2014-01-01	51.1476