Year	Percent
1993-01-01	13.067000000000000
1994-01-01	16.495800000000000
1995-01-01	15.380600000000000
1996-01-01	13.868100000000000
1997-01-01	13.598400000000000
1998-01-01	15.767000000000001
1999-01-01	18.100500000000000
2000-01-01	18.049700000000000
2001-01-01	18.308500000000000
2002-01-01	20.117900000000000
2003-01-01	24.061800000000000
2004-01-01	29.604200000000000
2005-01-01	37.331300000000000
2006-01-01	46.652400000000000
2007-01-01	53.027400000000000
2008-01-01	61.498200000000000
2009-01-01	61.498200000000000
2010-01-01	63.585900000000000
2011-01-01	57.220300000000000
2012-01-01	52.702500000000000
2013-01-01	50.297100000000000
2014-01-01	48.093999999999994
2015-01-01	46.894100000000000
2016-01-01	46.863200000000000