Year	Percent
1996-01-01	63.5630
1997-01-01	61.5220
1998-01-01	59.8257
1999-01-01	63.5548
2000-01-01	59.4669
2001-01-01	62.4543
2002-01-01	54.3817
2003-01-01	48.7169
2004-01-01	45.4832
2005-01-01	49.7980
2006-01-01	52.9694
2007-01-01	50.6151
2008-01-01	48.0972
2009-01-01	45.0207
2010-01-01	45.0171
2011-01-01	45.5382
2012-01-01	44.2453
2013-01-01	45.8042
2014-01-01	47.3774