Year	Percent
1996-01-01	53.0000
1997-01-01	46.6258
1998-01-01	47.7419
1999-01-01	46.4286
2000-01-01	47.9532
2001-01-01	46.4481
2002-01-01	45.0237
2003-01-01	47.8673
2004-01-01	47.0852
2005-01-01	44.3983
2006-01-01	40.7407
2007-01-01	41.4698
2008-01-01	38.7295
2009-01-01	36.1314
2010-01-01	44.3396
2011-01-01	44.6309
2012-01-01	47.4852
2013-01-01	49.3113
2014-01-01	47.1605