Year	Percent
1996-01-01	32.125900000000000
1997-01-01	34.481300000000000
1998-01-01	37.996800000000000
1999-01-01	41.950700000000000
2000-01-01	49.899700000000000
2001-01-01	49.178100000000000
2002-01-01	43.974300000000000
2003-01-01	52.733999999999995
2004-01-01	44.334300000000000
2005-01-01	55.932500000000000
2006-01-01	49.937300000000000
2007-01-01	51.559100000000000
2008-01-01	38.926100000000000
2009-01-01	46.699500000000000
2010-01-01	48.517100000000000
2011-01-01	52.700300000000000
2012-01-01	54.423000000000000
2013-01-01	53.139800000000000
2014-01-01	47.332500000000000