Year	Percent
1996-01-01	38.8519
1997-01-01	42.5487
1998-01-01	43.6308
1999-01-01	42.0487
2000-01-01	42.6328
2001-01-01	46.3599
2002-01-01	50.0679
2003-01-01	51.7419
2004-01-01	52.3727
2005-01-01	51.8647
2006-01-01	51.4154
2007-01-01	50.1563
2008-01-01	58.6428
2009-01-01	58.7105
2010-01-01	58.0013
2011-01-01	56.8452
2012-01-01	56.6342
2013-01-01	56.8207
2014-01-01	59.2723
2015-01-01	60.7453
2016-01-01	60.3506