Year	Percent
1992-01-01	1.4782899999999999
1993-01-01	1.2245800000000000
1994-01-01	1.2245800000000000
1995-01-01	1.9102500000000000
1996-01-01	0.7466109999999999
1997-01-01	1.1134400000000000
1998-01-01	1.4769299999999999
1999-01-01	1.6264299999999998
2000-01-01	1.8670300000000000
2001-01-01	2.1313100000000000
2002-01-01	3.2766400000000000
2003-01-01	5.5700500000000000
2004-01-01	6.1312000000000000
2005-01-01	7.7495400000000000
2006-01-01	7.8866800000000000
2007-01-01	8.7642600000000000
2008-01-01	9.4377900000000000
2009-01-01	8.7378000000000000
2010-01-01	9.3493400000000000
2011-01-01	9.3121400000000000
2012-01-01	11.2411000000000000
2013-01-01	13.4068000000000000
2014-01-01	15.4430000000000000
2015-01-01	16.0950000000000000
2016-01-01	18.0652000000000000