Year	Percent
1996-01-01	4.7815300000000000
1997-01-01	4.0508900000000000
1998-01-01	3.4197100000000000
1999-01-01	2.9197900000000003
2000-01-01	2.8526800000000000
2001-01-01	3.2435800000000000
2002-01-01	3.2376400000000003
2003-01-01	3.7026000000000000
2004-01-01	3.6429400000000003
2005-01-01	4.0924200000000000
2006-01-01	3.8908500000000000
2007-01-01	3.6502800000000004
2008-01-01	4.2154099999999990
2009-01-01	4.1804800000000000
2010-01-01	3.1160400000000004
2011-01-01	3.2695800000000000
2012-01-01	8.1288400000000000
2013-01-01	3.8740400000000000
2014-01-01	4.5127000000000000
2015-01-01	4.2766400000000000
2016-01-01	3.7214699999999996