Year	Percent
1996-01-01	3.9595900000000000
1997-01-01	3.9280699999999995
1998-01-01	3.5574100000000000
1999-01-01	3.3915599999999997
2000-01-01	3.2665599999999997
2001-01-01	3.3606400000000000
2002-01-01	3.0470200000000003
2003-01-01	3.3420099999999997
2004-01-01	3.7194300000000005
2005-01-01	3.5256800000000004
2006-01-01	3.3765699999999996
2007-01-01	3.3344300000000002
2008-01-01	3.1411500000000000
2009-01-01	2.7309300000000000
2010-01-01	3.0847900000000004
2011-01-01	3.3493900000000000
2012-01-01	3.0681500000000000
2013-01-01	3.0106100000000000
2014-01-01	2.8501900000000000
2015-01-01	2.8999200000000003
2016-01-01	2.8415500000000000