Year	Percent
1995-01-01	43.2664954625000
1996-01-01	43.6690456625000
1997-01-01	43.7255576750000
1998-01-01	43.6635297050000
1999-01-01	43.1448034950000
2000-01-01	42.4834587700000
2001-01-01	42.4962458900000
2002-01-01	42.6179766350000
2003-01-01	42.2191380850000
2004-01-01	41.7156564475000
2005-01-01	41.3979114650000
2006-01-01	40.8528947250000
2007-01-01	40.1255921300000
2008-01-01	39.8177925700000
2009-01-01	39.3678568825000
2010-01-01	38.8907848025000
2011-01-01	38.8279278175000
2012-01-01	32.2666666666667
2013-01-01	32.1166666666667
2014-01-01	31.5083333333333
2015-01-01	31.6250000000000
2016-01-01	31.5583333333333
2017-01-01	31.7416666666667