Year	Percent
1995-01-01	68.9832942325000
1996-01-01	67.9516757350000
1997-01-01	65.3912880500000
1998-01-01	64.6784188750000
1999-01-01	65.2643610575000
2000-01-01	63.8826726400000
2001-01-01	65.2174184250000
2002-01-01	65.8417810525000
2003-01-01	65.8377058925000
2004-01-01	68.3937413900000
2005-01-01	68.4598206900000
2006-01-01	70.1096598275000
2007-01-01	71.3979799850000
2008-01-01	71.7380645800000
2009-01-01	72.0794991025000
2010-01-01	72.5411824675000
2011-01-01	74.1178340700000
2012-01-01	75.5000000000000
2013-01-01	76.7083333333334
2014-01-01	76.1500000000000
2015-01-01	76.5583333333334
2016-01-01	76.7833333333333
2017-01-01	77.3500000000000