Year	Percent
1995-01-01	8.50785454260428
1996-01-01	7.96457371224467
1997-01-01	7.59034353180617
1998-01-01	6.96930009723538
1999-01-01	6.38858950996367
2000-01-01	5.45740053964180
2001-01-01	5.96178958890114
2002-01-01	6.60920433082838
2003-01-01	6.84754854687766
2004-01-01	6.11745194753485
2005-01-01	5.40649621036546
2006-01-01	5.34090988137443
2007-01-01	5.22613859006390
2008-01-01	5.76459811214722
2009-01-01	8.08854111481468
2010-01-01	7.44109315400743
2011-01-01	7.19133050841084
2012-01-01	6.62103071741742
2013-01-01	6.83972785254388
2014-01-01	6.75751172502516
2015-01-01	6.63444466881560
2016-01-01	6.99170769459896
2017-01-01	6.26675885734422