Year	Percent
1996-01-01	5.6387199999999990
1997-01-01	8.8320600000000000
1998-01-01	7.5277199999999995
1999-01-01	7.1063300000000010
2000-01-01	6.5201300000000000
2001-01-01	5.6274000000000000
2002-01-01	8.0039600000000010
2003-01-01	7.3658000000000000
2004-01-01	7.1093899999999990
2005-01-01	6.7717899999999990
2006-01-01	6.3212699999999990
2007-01-01	6.8972399999999990
2008-01-01	7.7031100000000010
2009-01-01	7.1018300000000005
2010-01-01	6.2494900000000000
2011-01-01	5.3919100000000000
2012-01-01	5.2539700000000000
2013-01-01	4.8179099999999995
2014-01-01	5.4566800000000000
2015-01-01	5.5778099999999995
2016-01-01	6.9093100000000005