Year	Percent
1996-01-01	4.9503800000000000
1997-01-01	4.9207100000000000
1998-01-01	4.2663199999999994
1999-01-01	6.2719800000000000
2000-01-01	4.9665000000000000
2001-01-01	5.1238100000000000
2002-01-01	5.0973800000000000
2003-01-01	5.3572300000000000
2004-01-01	5.9291599999999995
2005-01-01	4.9145100000000000
2006-01-01	6.0340900000000000
2007-01-01	5.2056200000000000
2008-01-01	5.6074199999999990
2009-01-01	6.2361900000000010
2010-01-01	4.5761699999999990
2011-01-01	7.0482900000000000
2012-01-01	3.3156500000000000
2013-01-01	3.7547800000000002
2014-01-01	3.1939000000000000
2015-01-01	3.5927300000000004
2016-01-01	2.7879400000000003