Year	Percent
1992-01-01	3.5929900000000004
1993-01-01	3.1253900000000003
1994-01-01	3.1253900000000003
1995-01-01	2.9310700000000000
1996-01-01	3.1551500000000000
1997-01-01	3.9579600000000000
1998-01-01	4.5959200000000000
1999-01-01	5.8684800000000000
2000-01-01	7.4491900000000000
2001-01-01	8.7640900000000000
2002-01-01	9.1363600000000000
2003-01-01	9.6142700000000000
2004-01-01	11.0102000000000000
2005-01-01	11.0116000000000000
2006-01-01	11.5993000000000000
2007-01-01	13.7254000000000000
2008-01-01	13.5257000000000000
2009-01-01	12.8897000000000000
2010-01-01	12.9425000000000000
2011-01-01	11.1842000000000000
2012-01-01	10.7641000000000000
2013-01-01	12.1280000000000000
2014-01-01	13.5070000000000000
2015-01-01	15.0236000000000000
2016-01-01	16.7269000000000000