Year	Percent
1995-01-01	32.1983117216834
1996-01-01	32.1601265522792
1997-01-01	31.7409693798830
1998-01-01	30.9563648910249
1999-01-01	30.2552779857637
2000-01-01	29.6295755306738
2001-01-01	29.2495798856124
2002-01-01	27.9043935234913
2003-01-01	26.7449770422207
2004-01-01	26.5970154082274
2005-01-01	27.0161931623038
2006-01-01	26.6596885292865
2007-01-01	25.8377382946639
2008-01-01	25.8304843256230
2009-01-01	25.7771535847155
2010-01-01	25.7445148801676
2011-01-01	25.8944605389503
2012-01-01	25.6992242653902
2013-01-01	25.3349278218663
2014-01-01	25.7769622953989
2015-01-01	25.8454701883353
2016-01-01	25.5690116761987
2017-01-01	24.9878132629880