Year	Percent
1995-01-01	41.7244014375000
1996-01-01	42.0293083075000
1997-01-01	41.8185535700000
1998-01-01	42.0165605100000
1999-01-01	42.8352883850000
2000-01-01	43.7349925125000
2001-01-01	43.4385487300000
2002-01-01	43.2394455025000
2003-01-01	43.5469004875000
2004-01-01	43.9292080025000
2005-01-01	45.2645150425000
2006-01-01	45.8796589950000
2007-01-01	47.0077394550000
2008-01-01	47.9818400700000
2009-01-01	48.3843979400000
2010-01-01	49.3172232200000
2011-01-01	49.6886539875000
2012-01-01	54.0750000000000
2013-01-01	54.6000000000000
2014-01-01	55.7000000000000
2015-01-01	55.9416666666667
2016-01-01	56.4250000000000
2017-01-01	56.7000000000000