Year	Percent
1991-01-01	13.049200000000000
1992-01-01	29.040000000000000
1993-01-01	34.297500000000000
1994-01-01	51.380900000000000
1995-01-01	43.417300000000000
1996-01-01	43.417300000000000
1997-01-01	43.417300000000000
1998-01-01	11.085000000000000
1999-01-01	10.285100000000000
2000-01-01	8.241719999999999
2001-01-01	10.578800000000000
2002-01-01	6.294300000000000
2003-01-01	7.359500000000000
2004-01-01	5.974200000000000
2005-01-01	5.728200000000000
2006-01-01	5.345200000000000
2007-01-01	6.308300000000000
2008-01-01	4.190000000000000
2009-01-01	5.430000000000000
2010-01-01	7.033500000000000
2011-01-01	7.059300000000000
2012-01-01	6.467700000000000
2013-01-01	6.625600000000000
2014-01-01	6.979900000000000
2015-01-01	6.603000000000000
2016-01-01	5.830800000000000