Year	Percent
1996-01-01	46.4487
1997-01-01	43.1852
1998-01-01	41.3746
1999-01-01	48.5970
2000-01-01	40.0773
2001-01-01	34.6783
2002-01-01	36.4167
2003-01-01	34.0902
2004-01-01	24.3487
2005-01-01	36.7441
2006-01-01	46.1134
2007-01-01	40.4554
2008-01-01	50.4441
2009-01-01	59.3626
2010-01-01	51.3197
2011-01-01	39.0007
2012-01-01	39.9645
2013-01-01	39.6497
2014-01-01	39.8086