Year	Percent
1996-01-01	65.6147
1997-01-01	67.5334
1998-01-01	64.1293
1999-01-01	29.4408
2000-01-01	33.8856
2001-01-01	35.8535
2002-01-01	36.4805
2003-01-01	33.8377
2004-01-01	65.4577
2005-01-01	54.5774
2006-01-01	54.2478
2007-01-01	60.3753
2008-01-01	63.8519
2009-01-01	56.5882
2010-01-01	56.4591
2011-01-01	56.9112
2012-01-01	54.4355
2013-01-01	51.2070
2014-01-01	54.6531
2015-01-01	51.4485
2016-01-01	51.1186