Year	Percent
1995-01-01	7.09747987288784
1996-01-01	6.90334088219982
1997-01-01	6.15791388644771
1998-01-01	5.53639056733455
1999-01-01	5.58606662566173
2000-01-01	4.62595622450375
2001-01-01	4.60608801110414
2002-01-01	4.58668869270002
2003-01-01	5.40628851198047
2004-01-01	5.50764425288105
2005-01-01	4.83078241521485
2006-01-01	3.89858243399535
2007-01-01	3.79897043164988
2008-01-01	3.43346986579617
2009-01-01	6.00911160238794
2010-01-01	7.46303444545787
2011-01-01	7.57279199233309
2012-01-01	7.52407173517170
2013-01-01	6.99536833830095
2014-01-01	6.59281033776353
2015-01-01	6.16961789419842
2016-01-01	6.18084327327485
2017-01-01	5.74329276936686