Year	Percent
1996-01-01	74.6841
1997-01-01	65.4448
1998-01-01	67.8877
1999-01-01	75.6267
2000-01-01	85.4292
2001-01-01	91.2758
2002-01-01	92.3794
2003-01-01	88.0334
2004-01-01	84.2975
2005-01-01	88.9447
2006-01-01	67.6766
2007-01-01	64.3387
2008-01-01	64.5434
2009-01-01	64.8525
2010-01-01	64.7553
2011-01-01	63.2548
2012-01-01	61.5905
2013-01-01	59.6964
2014-01-01	59.6585
2015-01-01	60.3754
2016-01-01	60.0361