Year	Percent
1995-01-01	8.24397109274070
1996-01-01	8.35293014428286
1997-01-01	7.64452074738023
1998-01-01	6.86287024245112
1999-01-01	6.19567147049320
2000-01-01	5.72149203540416
2001-01-01	5.97792767553491
2002-01-01	6.16560460417143
2003-01-01	6.18761860344074
2004-01-01	5.82529000776541
2005-01-01	5.61179755634421
2006-01-01	5.20094904045332
2007-01-01	4.74962839136686
2008-01-01	4.74049971731597
2009-01-01	5.97849482298824
2010-01-01	6.21521552729658
2011-01-01	5.98219111373359
2012-01-01	5.71933295537150
2013-01-01	5.56150837278252
2014-01-01	5.36814573663797
2015-01-01	5.38641977549589
2016-01-01	5.35478937178564
2017-01-01	5.16117971669955