Year	Percent
1993-01-01	59.372200000000000
1994-01-01	59.928999999999995
1995-01-01	61.505300000000000
1996-01-01	60.910100000000000
1997-01-01	61.638900000000000
1998-01-01	58.086600000000000
1999-01-01	50.856400000000000
2000-01-01	45.133800000000000
2001-01-01	38.487100000000000
2002-01-01	30.833700000000000
2003-01-01	26.803000000000000
2004-01-01	27.540000000000000
2005-01-01	30.193200000000000
2006-01-01	34.341500000000000
2007-01-01	39.073700000000000
2008-01-01	45.922600000000000
2009-01-01	47.654600000000000
2010-01-01	46.047900000000000
2011-01-01	47.341300000000000
2012-01-01	49.585600000000000
2013-01-01	50.535800000000000
2014-01-01	49.315800000000000
2015-01-01	48.540600000000000
2016-01-01	49.722900000000000